Database Users

Snapchat login fail

Hello all. So i own a galaxy s5 g900f and was using snapchat normally then i had to logout and now im tryin to login again but show up a message saying: "oh no! Your login temporarily failed, please try again later ". I already tried to clean the app data even sync my google acc. But no use . I have a rooted device. Anyone can help me please ? Thank you

Have you installed xposed? If so uninstall xposed login on snapchat and reinstall xposed... Problem should be solved!
And if you didn't install xposed make a backup and do a factory reset...
If none of the above helped install a custom rom if you want but that's all i know

RadsGam3R said:
Have you installed xposed? If so uninstall xposed login on snapchat and reinstall xposed... Problem should be solved!
And if you didn't install xposed make a backup and do a factory reset...
If none of the above helped install a custom rom if you want but that's all i know
Click to expand...
Click to collapse
I tried to install xposed but my phone got stuck on the samsung logo . You know any way to install xposed ?

So you don't have xposed installed... And you can't login on snapchat. I'd recommend to install a custom rom and first install snapchat and see if you can login but just be sure a cyanogenmod based rom is really good but you will lose touchwiz functions. Or you could just try a factory reset.

@luizinho123 did you use the uninstall framework flash zip? When your S5 got stuck at the samsung logo?
Also if you wanted to install xposed I would also agree with @RadsGam3R to install cyanogenmod or use samsung kies to reflash your device. Then install snapchat and login once you done that then you can do the following if you want xposed installed.
1. Download the correct xposed framework zip file here >
sdk23 for marshmallow
sdk22 for lollipop
sdk21 for kitkat
2. download the xposed installer here >
3. Reboot your device into your custom recovery and flash xposedframework
4. Reboot your device it may do another reboot in the process
5. once you're back in install the xposed installer and just download the xposed modules that you would like, then go to the the module section and tick the checkbox and reboot.
6. Sit back and enjoy xposed!
If you have any bootloops please read the known issues section on this post here >

HatchetEgg said:
@luizinho123 did you use the uninstall framework flash zip? When your S5 got stuck at the samsung logo?
Also if you wanted to install xposed I would also agree with @RadsGam3R to install cyanogenmod or use samsung kies to reflash your device. Then install snapchat and login then you will need to do the following
1. Download the correct xposed framework zip file here >
sdk23 for marshmallow
sdk22 for lollipop
sdk21 for kitkat
2. download the xposed installer here >
3. Reboot your device into your custom recovery and flash xposedframework
4. Reboot your device it may do another reboot in the process
5. once you're back in install the xposed installer and just download the xposed modules that you would like, then go to the the module section and tick the checkbox and reboot.
6. Sit back and enjoy xposed!
If you have any bootloops please read the known issues section on this post here >
Click to expand...
Click to collapse
Yes i have android 6.0 on my samsung . I tried to install xposed , but i got stuck on the samsung logo then i used the zip file to unistall . This snapchat thing just happened recently . I dont know . About the xposed did all steps that i saw on a thread here but still got stuck on samsung logo more than 15/20 min. Do you have any suggestions ? Thanks

RadsGam3R said:
So you don't have xposed installed... And you can't login on snapchat. I'd recommend to install a custom rom and first install snapchat and see if you can login but just be sure a cyanogenmod based rom is really good but you will lose touchwiz functions. Or you could just try a factory reset.
Click to expand...
Click to collapse
I installed the ressurection remix rom but couldnt record a video . And i want to install others roms but ive noticed that asks for aroma installer . I ve no idea wht that may be .

@luizinho123
you could try looking for these files to see if they exist if they do delete them. They are XposedBridge.jar and xposed.prop
you find "xposed.prop" in "system" and "XposedBridge.jar" in "system/framework"
once done reboot and try login in again.
Aroma installers are flashable zips but they give you the ability to customize the install, a bit like the typical windows installers where you can change the location of where the program is installed. You can run these in the custom recovery environment.

HatchetEgg said:
@luizinho123
you could try looking for these files to see if they exist if they do delete them. They are XposedBridge.jar and xposed.prop
you find "xposed.prop" in "system" and "XposedBridge.jar" in "system/framework"
once done reboot and try login in again.
Aroma installers are flashable zips but they give you the ability to customize the install, a bit like the typical windows installers where you can change the location of where the program is installed. You can run these in the custom recovery environment.
Click to expand...
Click to collapse
But i saw somewhere that xposed wasnt working with samsung stock roms . I think that s the reason why get stuck on samsung logo

You could be unfortunate that's the case for you because it was mentioned in this post here.
If you really want xposed you can try a custom rom then take the steps to flash xposed framework. This is what I have been doing for 15 months.
If you want the most stable custom rom I suggest using cyanogenmod 13, practically I have been using this for some time and rarely got any crashes.
You will need tho gapps along side because they're not included within the rom, I use Opengapps but you can choose a vaerity of gapps wether if you want all of them or ust the minamul just to have the playstore. There is an aroma installer which worked in the past for me, but no longer does for me for some strange reason. where you can choose which gapps you like installed. But I would recommend not using the armor installer as it can cause instability with the rom.
You will need to flash the gapps and rom together and you will only need to do that once providing your staying with that custom rom.

HatchetEgg said:
You could be unfortunate that's the case for you because it was mentioned in this post here.
If you really want xposed you can try a custom rom then take the steps to flash xposed framework. This is what I have been doing for 15 months.
If you want the most stable custom rom I suggest using cyanogenmod 13, practically I have been using this for some time and rarely got any crashes.
You will need tho gapps along side because they're not included within the rom, I use Opengapps but you can choose a vaerity of gapps wether if you want all of them or ust the minamul just to have the playstore. There is an aroma installer which worked in the past for me, but no longer does for me for some strange reason. where you can choose which gapps you like installed. But I would recommend not using the armor installer as it can cause instability with the rom.
You will need to flash the gapps and rom together and you will only need to do that once providing your staying with that custom rom.
Click to expand...
Click to collapse
Thanks man . I already have the small gapps on my sd card . I only need to know how to install and use aroma installer . Btw could you recommend any roms name to flash ?

luizinho123 said:
Thanks man . I already have the small gapps on my sd card . I only need to know how to install and use aroma installer . Btw could you recommend any roms name to flash ?
Click to expand...
Click to collapse
No problem
I wouldn't worry too much about aroma installers as I rarely had to use one myself. Aroma installers are part of a flashable zip file, which you would flash like an normal zip flle in your custom recovery, this video gives a good example of what you can do with one, Here >
I would recommend this rom since I found this more stable than Resurrection remix/ bliss pop/ AICP and liquid smooth, At least in my experience anyway.
However I have been testing this rom for a few day and seem pretty stable and much quicker than any other rom I tested so far!
Also in order to flash the files to install a new rom on your device you will need a custom recovery, I recommend installing this app for the latest custom recovery for the g900f

HatchetEgg said:
You could be unfortunate that's the case for you because it was mentioned in this post here.
If you really want xposed you can try a custom rom then take the steps to flash xposed framework. This is what I have been doing for 15 months.
If you want the most stable custom rom I suggest using cyanogenmod 13, practically I have been using this for some time and rarely got any crashes.
You will need tho gapps along side because they're not included within the rom, I use Opengapps but you can choose a vaerity of gapps wether if you want all of them or ust the minamul just to have the playstore. There is an aroma installer which worked in the past for me, but no longer does for me for some strange reason. where you can choose which gapps you like installed. But I would recommend not using the armor installer as it can cause instability with the rom.
You will need to flash the gapps and rom together and you will only need to do that once providing your staying with that custom rom.
Click to expand...
Click to collapse
Thanks . i installed the ROM you recommended . and i loged on snapchat without any problems . but now i cant record a video . it gives me an error . any solution for that ?

luizinho123 said:
Thanks . i installed the ROM you recommended . and i loged on snapchat without any problems . but now i cant record a video . it gives me an error . any solution for that ?
Click to expand...
Click to collapse
Did the error say "camera has stop responding" or something along those lines?

HatchetEgg said:
Did the error say "camera has stop responding" or something along those lines?
Click to expand...
Click to collapse
Yes . it says . video recording failed .
I got the same error when I had the ressurection remix ROM installed

Before flashing the ROM did you do the following?
1. Wipe data
2. Wipe cache
3. Wipe dalvik and art cache
4. Flash custom rom
5. Flash gapps
6. reboot into system.
In this order?

HatchetEgg said:
Before flashing the ROM did you do the following?
1. Wipe data
2. Wipe cache
3. Wipe dalvik and art cache
4. Flash custom rom
5. Flash gapps
6. reboot into system.
In this order?
Click to expand...
Click to collapse
Yes . I do that every time I flash a ROM . don't know what to do smh

luizinho123 said:
Yes . I do that every time I flash a ROM . don't know what to do smh
Click to expand...
Click to collapse
You could try wiping the system as well when flashing the new custom rom.

HatchetEgg said:
You could try wiping the system as well when flashing the new custom rom.
Click to expand...
Click to collapse
I know . I select all except micro SD and the other after .

can you remember when you last updated your phone whilst it was on stock?

Kali Linux NetHunter OnePlus One

Hello guys, would like to install on cm 13.1 nethunter, still have nothing done, supersu and twrp I have on pc. Can you help me step by step.Thanks
picload.org/image/rocripla/20170202_223718.jpg
picload.org/image/rocriplr/20170202_223554.jpg
Hello Ramon tx for help
i have last adb for win 10,twrp-3.0.2-0-bacon.img,SuperSU-v2.79-201612051815,nethunter-cm13-6.0.1-20160925-full(this is was i need for android 6 or?!),nethunter-oneplus1-lollipop-3.0(this is for android 5 or not for me?!)
I find this tutorial kali.org/tutorials/kali-linux-android-linux-deploy/
I was look the video,tx bro ??

So just a few questions for you.
1. Do you have ADB tools installed on your pc? If no download those aswell.
2. Have you already flashed TWRP Recovery mod? And which version do you have on your pc? (this is because I couldn't flash the newest version inmediatly because it was too big for the old TWRP)
3. Is your OnePlus One rooted? I tought you could do that by enabling developers edition and then scroll down to root access and put it on Apps and ADB
4. Do you have the custom rom that you want to installed ready? Make sure you checked compatibility etc.
Because if you have all of that you are pretty much good to go.
---------- Post added at 03:12 PM ---------- Previous post was at 02:24 PM ----------
Assuming you have root and TWRP already installed on your OnePlus One.
Just follow this tutorial: search on youtube Instalar NetHunter Kali Linux en el OnePlus One its a video made by Victor Candela
If you have any problems let me know.
The video is spanish but you can see what he does. In case someone can't here is what he does:
1. Boot into Recovery (by pressing volume down + power button at the same time when device is powered off)
2. Wipe the Dalvik Cache and Cache
3. Install/Flash superuser zip file onto the device. (this is used for root access)
3. Install/Flash the nethunter.zip file onto the device
4. Reboot the device
And after that he shows some things for the app.
p.s press reply on the left bottom of your screen instead of editing your post

hayabusa777 said:
Hello guys, would like to install on cm 13.1 nethunter, still have nothing done, supersu and twrp I have on pc. Can you help me step by step.Thanks
picload.org/image/rocripla/20170202_223718.jpg
picload.org/image/rocriplr/20170202_223554.jpg
Hello Ramon tx for help
i have last adb for win 10,twrp-3.0.2-0-bacon.img,SuperSU-v2.79-201612051815,nethunter-cm13-6.0.1-20160925-full(this is was i need for android 6 or?!),nethunter-oneplus1-lollipop-3.0(this is for android 5 or not for me?!)
I find this tutorial kali.org/tutorials/kali-linux-android-linux-deploy/
I was look the video,tx bro
Click to expand...
Click to collapse
I have tried Kali Hunter on oneplus one, would like to use alfa stick with rt3070 chip. When I write in the terminal lsusb, he shows me the alfa stick, when I do monitor mode, he is not found, synonymous under etc, firmware, drivers From Mediathek reinkopiert, does not go nevertheless

I've managed to have the current kernel installed from here >>build.nethunter.com/nightly/3.15.4-20170211-0304/

hayabusa777 said:
I've managed to have the current kernel installed from here >>build.nethunter.com/nightly/3.15.4-20170211-0304/
Click to expand...
Click to collapse
Nice. Altough I'm not sure why its not working. It could be due to some compatibility issues.

It's running now tx

Help install OxygenOS

Hey. I long story short - I have wiped OS, and the only thing that I can do is use fastboot and also install TWRP or stock recovery.
I found OxygenOS file, but cant install it as there are problems sideloading the file to the device, it looks like ADB drivers on PC are not recognizable. Can someone help me to get back OS? Thanks
Tried a lot of things but anyway nothing happens.

BooBzi said:
Hey. I long story short - I have wiped OS, and the only thing that I can do is use fastboot and also install TWRP or stock recovery.
I found OxygenOS file, but cant install it as there are problems sideloading the file to the device, it looks like ADB drivers on PC are not recognizable. Can someone help me to get back OS? Thanks
Tried a lot of things but anyway nothing happens.
Click to expand...
Click to collapse
Push the OOS rom via usb to the phone, command: adb push namerom /scard
Next time check the drivers installation result first.

I wish I knew the reply above mine.
How I fixed my issue:
I installed the latest TWRP 3.1.1 in one of the installation guides on this forum for the OP5. Make sure you pick the version that is called the "last latest build". I was able to flash a full zip for 4.5.2 and it worked!

chaojimbo said:
I wish I knew the reply above mine.
How I fixed my issue:
I installed the latest TWRP 3.1.1 in one of the installation guides on this forum for the OP5. Make sure you pick the version that is called the "last latest build". I was able to flash a full zip for 4.5.2 and it worked!
Click to expand...
Click to collapse
I had problems with ADB drivers, anyway got back to life:
1) booted to TWRP
2) adb push ".zip" /sdcard/.
3) tried installing it at TWRP, no success, so get back stock recovery and flashed the file there.
So my issue is resolved. thanks!

TWRP flash - no way to get Recovery Mode working

[Question]
Hey guys. I follow lots of your advices.
I tried to upgrade Lineage OS from 14.1. to 15.1 on the X720 last weeks. I had the Error 7 in the installation progress like many of you had - and not cried loud, but tried the demanded fixes;
- Bootloader is unlocked
- downloaded a newer version of the official Lineage OS 15.1. , tried the actual TWRP with magisk (before v.3.02.)
- everything tried but its now not posible to get into RECOVERY Modus ...
Is there a way to get back the old TWRP, thart worked?
I flashed the TWRP two times, but it does not work.
did i forget something?

Use Mauronofrio's tool called: "TOOL ALL IN ONE"" it's great, install it and check for updates.
Get it here:*https://toolaio.tk**
Get additional instructions from the XDA Main Page: https://forum.xda-developers.com/android/software/tool-tool-one-driversunlocktwrpfactory-t3358711
* The all is one tool is excellent and you can use it to install everything you want.
* You can use it to help with unlocking the bootloader, then installing the most recent compatible TWRP, flashing your Rom, Gapps and Magisk etc.
* The tool will also update your copy of ADB, Android Drivers, and provide system wide privileges for ADB

tsongming said:
Use Mauronofrio's tool called: "TOOL ALL IN ONE"" it's great, install it and check for updates.
Get it here:*https://toolaio.tk**
Get additional instructions from the XDA Main Page: https://forum.xda-developers.com/android/software/tool-tool-one-driversunlocktwrpfactory-t3358711
* The all is one tool is excellent and you can use it to install everything you want.
* You can use it to help with unlocking the bootloader, then installing the most recent compatible TWRP, flashing your Rom, Gapps and Magisk etc.
* The tool will also update your copy of ADB, Android Drivers, and provide system wide privileges for ADB
Click to expand...
Click to collapse
Hey, Thank you for your response. I will try it. At the End, i want to install Lineage OS 15.1. on my LEX 720. I hope, the tool is able to help me there, too.

flexer911 said:
Hey, Thank you for your response. I will try it. At the End, i want to install Lineage OS 15.1. on my LEX 720. I hope, the tool is able to help me there, too.
Click to expand...
Click to collapse
Yes it can do that as well as update your adb, android drivers and give adb system wide access. Its a great easy to use tool. especially for people who are new to custom roms.

Hello in order to get into recovery mode you should go into the fastboot menu, and then flash any version of twrp that you want then reboot into the recovery.

Problem solved, nice tool. Very helpful. Now i am installing Lineage OS 15.1.

[Guide] Easily Build and Install LineageOS 17.1 with or without Gapps replacement

I've put together a guide for building your own LineageOS 17.1 (android 10) using a docker build environment or on your own system. The guide includes environment setup, and installation instructions as well as some troubleshooting and debugging information.
The easy way is as simple as cloning two git repos, getting the docker image, and running build_sargo.sh
The hard way goes into more detail, requires more previous knowledge, and doesn't use the docker but is useful for getting more familiar with the process.
The docker image is one that already existed for building lineageos 16modified to supports lineagsos 17.
It also includes patches that haven't been merged upstream yet that fix bluetooth, a bootloop, and increase battery life.
With some small modifications, this could also be used for the Pixel 3a XL (bonito)
https://github.com/SolidHal/Build-lineageos-sargo

Thanks for this!
Stealth111

SolidHal said:
I've put together a guide for building your own LineageOS 17.1 (android 10) using a docker build environment or on your own system. The guide includes environment setup, and installation instructions as well as some troubleshooting and debugging information.
The easy way is as simple as cloning two git repos, getting the docker image, and running build_sargo.sh
The hard way goes into more detail, requires more previous knowledge, and doesn't use the docker but is useful for getting more familiar with the process.
The docker image is one that already existed for building lineageos 16modified to supports lineagsos 17.
It also includes patches that haven't been merged upstream yet that fix bluetooth, a bootloop, and increase battery life.
With some small modifications, this could also be used for the Pixel 3a XL (bonito)
https://github.com/SolidHal/Build-lineageos-sargo
Click to expand...
Click to collapse
There should be VERY little modification required from sargo to bonito as one is simply a different size than the other. (I'm actually surprised that nobody ever compared the two in terms of hardware (especially since their simultaneous release).

I have built pure lineageos 17 according to https://forum.xda-developers.com/pixel-3a/how-to/guide-easily-build-install-lineageos-17-t4048063
The esim manager has to be disabled or you have to stop enforcing SELinux.
Download:
https://drive.google.com/drive/folders/19MD_1CZrhejh29ui3Q12Ypqfp-mU3dlt?usp=sharing

anonym12 said:
I have built pure lineageos 17 according to https://forum.xda-developers.com/pixel-3a/how-to/guide-easily-build-install-lineageos-17-t4048063
The esim manager has to be disabled or you have to stop enforcing SELinux.
Download:
https://drive.google.com/drive/folders/19MD_1CZrhejh29ui3Q12Ypqfp-mU3dlt?usp=sharing
Click to expand...
Click to collapse
If you include gapps in your build, the esim manager should stop crashing. If running gappless, I remove esim and hotword enrollment from the proprietary files.

gee one said:
If you include gapps in your build, the esim manager should stop crashing. If running gappless, I remove esim and hotword enrollment from the proprietary files.
Click to expand...
Click to collapse
Hello!
I have also built & installed lineageos 17 according to the guide above, thanks!
Now i like to install Gapps, but how? Booting to linage-recovery and flash from internal storage wont work as it refuse to mount? And adb sideload'ing gapps-nano-zip gives a error message about to little space available? Any ideas?

spinxen said:
Hello!
I have also built & installed lineageos 17 according to the guide above, thanks!
Now i like to install Gapps, but how? Booting to linage-recovery and flash from internal storage wont work as it refuse to mount? And adb sideload'ing gapps-nano-zip gives a error message about to little space available? Any ideas?
Click to expand...
Click to collapse
The issue is the new dynamic partition scheme doesn't leave enough room to install any extra system apps. There is a patch on the Lineage Gerrit, but it hasn't been merged (https://review.lineageos.org/c/LineageOS/android_device_google_bonito/+/261941).

fireclaw722 said:
The issue is the new dynamic partition scheme doesn't leave enough room to install any extra system apps. There is a patch on the Lineage Gerrit, but it hasn't been merged (https://review.lineageos.org/c/LineageOS/android_device_google_bonito/+/261941).
Click to expand...
Click to collapse
Thanks for letting me know, so as of now there is no workaround to get GApps work with this branch after it has been installed?

spinxen said:
Thanks for letting me know, so as of now there is no workaround to get GApps work with this branch after it has been installed?
Click to expand...
Click to collapse
Not that I know of. You either have to create space for G-Apps, or bundle G-Apps with the ROM.

spinxen said:
Hello!
I have also built & installed lineageos 17 according to the guide above, thanks!
Now i like to install Gapps, but how? Booting to linage-recovery and flash from internal storage wont work as it refuse to mount? And adb sideload'ing gapps-nano-zip gives a error message about to little space available? Any ideas?
Click to expand...
Click to collapse
I include gapps when I build the ROM. I have a vendor tree that is based off of opengapps pico. I just unpacked this pico zip and mimic'ed what it installed, plus something like pixel migration tool.

gee one said:
I include gapps when I build the ROM. I have a vendor tree that is based off of opengapps pico. I just unpacked this pico zip and mimic'ed what it installed, plus something like pixel migration tool.
Click to expand...
Click to collapse
Would you mind to share your zip? Thanks!

spinxen said:
Would you mind to share your zip? Thanks!
Click to expand...
Click to collapse
https://opengapps.org/

anonym12 said:
I have built pure lineageos 17 according to https://forum.xda-developers.com/pixel-3a/how-to/guide-easily-build-install-lineageos-17-t4048063
The esim manager has to be disabled or you have to stop enforcing SELinux.
Download:
https://drive.google.com/drive/folders/19MD_1CZrhejh29ui3Q12Ypqfp-mU3dlt?usp=sharing
Click to expand...
Click to collapse
gee one said:
I include gapps when I build the ROM. I have a vendor tree that is based off of opengapps pico. I just unpacked this pico zip and mimic'ed what it installed, plus something like pixel migration tool.
Click to expand...
Click to collapse
This is somewhat above my level of knowledge, if you have a complete build zip with Gapps, do u mind sharing this with me?

How to install?

LioneageOS 17.1 for Poxel 3a: Notes from the front
gee one said:
I include gapps when I build the ROM. I have a vendor tree that is based off of opengapps pico. I just unpacked this pico zip and mimic'ed what it installed, plus something like pixel migration tool.
Click to expand...
Click to collapse
Because of the issues, I have stuck with those versions that include GApps (invisiblek's simple LineageOS 17.1 works a treat, and is cloneable for those looking to build their own). Until beta 3 of Android 11 drops, I'm running this. Still no TWRP, or root, or anything else. Other than Pixel Launcher, I'm basically running stock Lineage.

Hi guys,
Just built my own image according to the 'easy' method (using docker). Took about 5 hours, and seemed to have gone well, almost no errors
I started out by flashing the Pixel 3a with the lastest Android 10 Factory Image from Google (QQ2A.200305.002, Mar 2020) to be sure it's as clean as possible. Booted into Android 10 once, enabled Developer Settings et cetera.
Then followed the 'Install' steps from https://github.com/SolidHal/Build-lineageos-sargo:
- boot into bootloader (fastboot mode)
- run 'fastboot flash boot boot.img'
- reboot into recovery -> Apply update -> Apply from ADB -> run 'adb sideload lineage-17.1-20200404-UNOFFICIAL-sargo.zip' (in my case)
When entering recovery mode I noticed an error at the botton of the screen: 'E:[libfs_mgr]Failed to mount /data: Invalid argument'. Despite that I could continue and sideload/install my self built lineageos zip, which finished without error (status 0). After installation the phone went back to into recovery mode (as described on the Github guide). Unfortunately, when I continued and picked 'Reboot System Now' I got thrown into the bootloader with enter reason: 'error boot prepare'. Every time the phone boots I see this error now.
Does anybody have a clue what I could be doing wrong? Any help is appreciated, thanks!
Edit: Okay, seems my problem is solved. When flashing the self-built boot.img, in my case I also had to specify which boot part to flash to: boot_a or boot_b. After having done that, booting now works.
Thanks SolidHal for providing your docker file and making it easy to built your own LineageOS 17.1 image!

Working and Running Smoothly
Thanks for posting this.
I was also able to build and install this successfully using the easy method. Yes, it takes a long time and requires an ample amount of memory and storage.
The battery life is excellent compared to the other roms/kernels I've tested so far. Started with a factory flash of Android 10.0.0 (QQ2A.200305.002, Mar 2020) (https://developers.google.com/android/ota). Then I followed the instructions here.
I also had the E:[libfs_mgr] error but it still installed correctly after the second try. Specifying boot_a or boot_b may have been what got this to work for me. Thanks to P1x3l3d.
Rooted by patching the boot image with Magisk (https://forum.xda-developers.com/pixel-3a/how-to/how-to-root-pixel-3a-preferred-t3938783).

P1x3l3d said:
Hi guys,
Just built my own image according to the 'easy' method (using docker). Took about 5 hours, and seemed to have gone well, almost no errors
I started out by flashing the Pixel 3a with the lastest Android 10 Factory Image from Google (QQ2A.200305.002, Mar 2020) to be sure it's as clean as possible. Booted into Android 10 once, enabled Developer Settings et cetera.
Then followed the 'Install' steps from https://github.com/SolidHal/Build-lineageos-sargo:
- boot into bootloader (fastboot mode)
- run 'fastboot flash boot boot.img'
- reboot into recovery -> Apply update -> Apply from ADB -> run 'adb sideload lineage-17.1-20200404-UNOFFICIAL-sargo.zip' (in my case)
When entering recovery mode I noticed an error at the botton of the screen: 'E:[libfs_mgr]Failed to mount /data: Invalid argument'. Despite that I could continue and sideload/install my self built lineageos zip, which finished without error (status 0). After installation the phone went back to into recovery mode (as described on the Github guide). Unfortunately, when I continued and picked 'Reboot System Now' I got thrown into the bootloader with enter reason: 'error boot prepare'. Every time the phone boots I see this error now.
Does anybody have a clue what I could be doing wrong? Any help is appreciated, thanks!
Edit: Okay, seems my problem is solved. When flashing the self-built boot.img, in my case I also had to specify which boot part to flash to: boot_a or boot_b. After having done that, booting now works.
Thanks SolidHal for providing your docker file and making it easy to built your own LineageOS 17.1 image!
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Did you build in Linux? If so, which version? (I'm not used to building Docker - and especially in Linux - and I'd rather do it right; therefore WHICH version of Linux has everything to do it right is critical.)

PGHammer, I don't think it's going to matter too much what distro you use because you're going to have to install the latest platform-tools and install docker from a repo anyways. Just use something recent. Ubuntu comes to mind if you're not a huge GNU/Linux guy.
I built using Debian Stretch and had no issues other than my ram got all used up so I had to create more swap and add
vm.swappiness=60 to /etc/sysctl.conf
You need 100+GB HDD, 16GB+ RAM, and a fat swap space (I used a 20GB Swap file)
Also someone (anon12?) already posted a ~700MB zip of their build in this thread and I can confirm it works.

barqs_root said:
Also someone (anon12?) already posted a ~700MB zip of their build in this thread and I can confirm it works.
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How did you you get this to install, I get signature verification failed, error:21. Then abd aborts the installation. I confirmed the integrity of the images with the provided checksum files. I even downgraded back to February's update because I was on Aprils update and thought that maybe that was the issues.
The steps I did are as follows:
Unlock bootloader
Enable debugging
Booting into the boot loader- run ./fastboot flash boot_a boot.img( ./ before is required due to being stuck on windows while I work from home.) Successfully installs to boot_a in 2.5sec.
Booting to recovery
Wipe/factory reset
Apply update from ADB- ./adb sideload lineage-17.1-20200222-UNOFFICIAL-sargo.zip
This is the following errors
E: failed to verify whole-file signature
Update package verification took 35.0 s (result 1).
E: Signature verification failed
E: error: 21
Install from ADB completed with status 2.
Installation aborted.