Cert Sha1 Fingerprint Generated At Debug Does Not Match With The Keystore I'm Using

This is the issue: When I run my app which is using Google Play Game Services I got an error trying to sign in 'The application is incorrectly configured. Check that the package na

Solution 1:

I found the issue. When you configure Google Play Game Services, you have to add the SHA1 fingerprint of you .keystore file and ALSO you have to add the debug.keystore file located at .../.android/, both fingerprints are added at the linked application link in the Developer Console. It is because when I run my app the .keystore file used was not configured at Developer Console, where the default SHA1 taken is the release.