I've now spent over 8 continuous hours trying to figure out what is wrong and I still have'nt found a solution. I added leaderboards and achievements to my libgdx android app, and published it in alpha. For some reason, when I try to sign in in game, I get the following popup: "Failed to sign in.Please check your network connection and try again". My SHA1 key is correct(I checked credentials in the developer console) and so is my client ID. I have no idea what is causing my problem. When I check logcat, I see this: GameHelper: onAR: responseCode=SIGN\_IN\_FAILED, so giving up.

I also added myself as a tester.

Does anyone know how to fix this?!