There's no definite manual to fix issues with the Google Play Store not working, but these tips and tricks might help. Check them out!
Google Play Store won't let me sign into any games I play. What should I do to fix this error? : r/AndroidGaming
FIXED] Unfortunately Google Play Services Stopped Error - JoyofAndroid
What to do if you see 'Unfortunately Google Play Store has stopped' errors in Android - Tech Junkie
Google Play Store not working? Here are some fixes you can try out, o que é a play store
Google Play Store apps not updating, Here is the fix
How to clear Google Play Store CACHE
How to Fix App Updates on Google Play Stuck on Pending
Fix problems with the Google Play Store app - Google Play Help
Solved] How to Fix Google Play Store Error 504 - iMobie Support
Top 10 Ways to Fix 'Your Device Isn't Compatible with This Version' on Android - Guiding Tech
Google Play Store Not Working: 10 Proven Fixes
Google Play Store Not Working on Wi-Fi (Solved) - RouterCtrl