Game Center authentication doesn't appear (error code 2) [257.20]

[MJK]

So I'm just trying out Game Center for the first time, so I might be missing something basic, but I have enabled Game Center on iTunes Connect and was able to login with a sandbox account using iPhone 5. However, on iPod touch 4th gen I seem to be unable to bring up the authentication screen and Xcode shows the following error:

GameCenter Error 2: Error Domain=GKErrorDomain Code=2 "The requested operation has been cancelled." UserInfo=0x1cd82810 {NSLocalizedDescription=The requested operation has been cancelled.}

Any ideas on what might be causing this error?

[arthurh]

Is the gamecenter account of the ipod put on the test users in itunes ?

[MJK]

Hmm.. it should not matter in this case, because the problem is that I can't get the login screen to appear on iPod at all.

Whereas on iPhone 5, GC authentication screen pops up normally, on iPod it does not show at all, so I can't even try logging in to GameCenter on iPod..

[AyreGuitar]

MJK - All I can think of is:
Are you logged out of Game Center on your iPod touch before you run your app? This allows you to then log into the sandbox account for Game Center, but might cause problems if you're already logged into a normal Game Center account.

[MJK]

Yes, AyreGuitar, I'm logged out of GC on the iPod touch as well when trying to bring up the authentication screen.

[arthurh]

I think you should try to create another GC account and see what append.

[MJK]

You were right: on the iPod touch, GC seemed to be somehow stuck even though I was logged out. After I created a new account (normal one, not sandbox), and logged out of that too, the authentication appears normally. Thanks for the help!

[Anders]

The sandbox mode is very dodgy. For some reason you can sometimes be on a sandbox account in non-sandbox mode and vice-versa.