google play game services - testing accounts login results in unknown error

Question

I\'ve followed the tutorials on how to implement the google play game services for android and have ended up with the simple google+ sign in. I tried how ever to login befor

Answer 1

This kind of problem is usually a Client ID setup issue. There probably is a mismatch between your Client ID setup, your package name and the certificate you are using to sign the app. In any event, follow our troubleshooting guide step by step, and it should take you to the solution:

https://developers.google.com/games/services/android/troubleshooting.html