Android Studio not showing any errors?
I don't know what happened,
but when I copy paste the code or write something, there are
no errors.
See the picture below where I copied the code but haven't imported the imports yet. But Android studio doesn't show any errors. Even when I do Ctr + Alt + O
It doesn't import anything 
Do they have any settings to get it back or something?
I've already tried updating all available updates
It looks like you might be in power saving mode. Check it out in the menu File
just above Exit
. When saving power, the code check is disabled.
To check the code again, you can: 1) exit power saving mode or 2) manually check the code using Inspect Code...
the menu Analyze
.
On the right, click on the smiling face and drag the progress bar on the right:
Clean project and click ALT + ENTER
for import
to android studio
in logcat view mode
try to remove any filter or filter with your application
Click on the bottom right corner icon in android studio and uncheck the Power saving mode
On the right side, theres colored squares next to the scroll bar. Enter the red square view to see the error.