Camera Keeps Stopping - Samsung Galaxy S8 Questions and Answers

Hello,
I have an unlocked Galaxy S8 (unrooted). Until last night, everything was working fine.
This morning, there seems to be something wrong with my Camera App.
When I click the Camera App, it just dies out and flashes the "Camera has Stopped" error message.
I use WhatsApp quite a bit to talk to my family oversees. I tried it earlier this morning - the selfie camera worked fine, but when I try to switch the camera from within WhatsApp, it doesnt work. As I mentioned, I did use WhatsApp video call last night which worked fine.
Here are the things I have tried:
There were auto updates to some apps overnight which I thought could be the problem, (Youtube, United and Skype) but I uninstalled those.
After googling the problem, I also Wiped Cached Partition.
I also tried installing a random camera app from the App store, but it also does not work.
I turned the phone on in Safe Mode and checked the Camera App. It still doesnt work, which makes me believe that the issue isn't because of a 3rd party app.
Can someone please help? I don't know what the issue is.

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[Q] Lost hotword detection, can't even run setup

I've been using the OK Google hotword detection since I've installed the rooted 4.4.2 leaked rom and everything has been fine for a month or so. Just recently it completely stopped working, voice search now only works if I hit the microphone button. Even if I uninstall Google Search and reinstall it and try to run the setup again it won't work. When it asks me to train my voice and say "OK google" three times it won't pick up anything.
So this all started when I woke up one morning and my alarm clock Sleep Genius had an error and stopped working, and when I forced closed it and hit the home button I had to pick the launcher again (I've been using Apex) . So I picked Apex again and noticed my background was different than what I had before. Don't know if that has to do with anything but that's when I noticed hotword detection stopped working. I uninstalled both apps to see if that would work and still nothing. Any ideas? Thanks.
Silly question: have you restarted the phone? You didn't state that in your post.
Also, have you tried clearing cache/dalvik?
Okay so I tried wiping the caches and that didn't do anything. I started digging a bit more into this (searched Google and about 15 pages in found this) - disabling apps that are turned on under the Accessibility menu. Turned off Music Boss, Pebble watch and Lightflow. Sure enough started working again!
Will this effect how any of these apps work? I tested out my pebble and it still got a notification so everything seems fine so far.
Thanks for the help though!

Trouble with sensors after the recent update

This is a problem I didn't notice right away. I attribute it to the QF2 update because wife also has an S7 and experiences exactly the same issue.
In a matter of hours after reboot the internal sensors stop working or behave erratically. Sometimes the phone would go to the lowest brightness, the screen will not turn off by the proximity sensors during a conversation. Functions relying on shaking the phone stop working. Some (but for some reason not all) apps don't switch to the landscape mode. I downloaded several sensor testing apps and they confirmed my suspicions. After the reboot everything works, but several hours later sensors start showing random values or "no data".
Does anyone else have the same problem? With two affected phones in my possession it can't be a random fluke.
The phones are not rooted.
I had an issue where the phone no longer responded to "OK Google". Turns out I uninstalled all the updates to the "Google" app and reinstalled them from Google Play and that fixed it. I wasn't sure if it was the OTA for the phone or something else, but the OTA might have jacked something up somewhere. Have you cleared cache and such to see if that fixes it? Otherwise, I'm having no issues with the sensors not working.
Thanks for your suggestion. My phones are set for manual updates. I updated everything and rebooted. The sensors worked fo about 12 hours and stopped. Which cache you recommend to purge? Google app?

Google play and whatsapp suddely crashing

Hello,
something weird is happening here. It has been a few days that every time I run the play store, it immediately crashes. I tried every solution I have found online to fix the play store, but had no luck. In particular, if I delete data, cache and updates, sometimes I can get it to work, but only for few minutes.
What is really weird is that also WhatsApp started to crash about the same day, but only when I open certain specific chats (i.e., I can access the app and chat with some people but not others). They may be unrelated, but it looks funny.
Everything else works perfectly as usual. I'm running stock oreo, rooted, with adaway and substratum. Tried to disable both as they may interfere, but the problem persists. Any idea?
EDIT: disabling the whole substratum theme seems to solve the problem. Only disabling the overlay of the single apps as usual is not enough.
EDIT2: after clearing all the overlays and having rebuilt them, everything works. I guess just updating every time can mess up something. Better clean everything and rebuild every now and then.
I have the EXACT same symptoms. I had restored/reset everything for the last two weeks. Initially it worked until the reset. While WhatsApp & Play Store appear fine, Substratum will no longer connect to Andromeda. I've uninstall/reinstall, rebooted, latest APK for Substratum but nothing works - Substratum will no longer start. Always the same - 'verification has failed; force close sub or reinstall addon'. Tried everything I could google and nothing works.
No pirated apps, in US (no vpn), debugging ticked (andromeda), USB debugging enabled (S8), ADB enabled, Andromeda.bat enabled, android driver current.
Any new ideas?

Camera stopped working

Hi guys, my phones camera completely stopped working. I restarted the phone multiple times, and force closed the camera app, but still nothing. I tried other camera apps, but non of them worked. I don't have any ideas what to do. Do anybody know what to do?
just working fine again... no idea what happened

Multiple problems-Notifications delayed, Play Store downloads stuck, Some apps broken

Hi, I have a Galaxy S10+ on Verizon in the USA.
Having a few major problems that I just can't figure out:
1. When I try to download apps from the Play store, the download gets to 99 or 100% but never completes the installation. The fix is to go into settings/apps/show system apps/download manager and "force stop." Then the installation will complete.
2. Some apps don't work correctly. For example the CBS Radio News app starts streaming audio, then stops a few seconds later. And the ParKing app sometimes records my location upon disconnection from my car's bluetooth, and sometimes it doesn't.
3. Notifications from all apps are totally unreliable. Sometimes they'll come right away. Sometimes not for hours, and sometimes all at once. And sometimes when tapping on a notification it will bring you into the app. while sometimes it will do nothing.
WHAT I TRIED:
Tried rebooting, clearing data and cache on problem apps.
Cleared data and cache on "Google", Google Play Store and google play services.
Cleared phone's cache partition.
Uninstalled and reinstalled broken apps.
I THOUGHT I FOUND THE SOLUTION:
All these problems went away a month or so ago when I logged out of my google account on the phone. Iogged back in and it all worked great! I thought the problem was solved, but now it's all happening again. Logged of the the google account and back in, but it's still broken this time.
AND:
I had similar problems with my Galaxy S7, and thought the new phone would fix these problems! Is it possible there's something wrong with my google account? How could I have the same problems on both phones?
I haven't yet tried a factory reboot on the S10+, but I did do it on the S7, and after working for a while, the problems came back.
Additional info:
Mobile data and wifi have strong signals.
No custom ROMs, not rooted or anything, just stock the way it came. Only downloaded apps from Play Store. Nothing sideloaded.
All battery optimization is turned off. Power mode set to "high performance."
I've looked everywhere for a solution and have come here to the ultimate experts. You're my last hope!
Thanks in advance for any help you can provide.

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