I have followed the tutorial here: https://developers.google.com/identity/sign-in/android/start-integrating to integrate Google sign in into my app.
However, the GoogleSignInResult.isSuccess() is always false. GoogleSignInStatusCodes.getStatusCodeString(googleSignInResult.getStatus().getStatusCode()) shows INTERNAL_ERROR. The docs here say "retrying should solve the problem", but it doesn't.
Any ideas on what's wrong?
Similar question here, but I have added the json file.