Solution 1 :
you need to update your
google-services.json file in your Android project.
I’m having problems with google sign in working in my app on debug mode(still have’nt published a release mode) after shifting to a new PC. It was working well initially.
For this new PC I have updated new SHA1 and SHA256 keys on Firebase console (There were 2 new sets of each key generated) but I still get the error:
Unhandled Exception: PlatformException(sign_in_failed, com.google.android.gms.common.api.ApiException: 10: , null, null)
Comment posted by Black Eyed Beans
Also did that. Problem still persists