hello!
Same issue with GAME CENTER I found today (same like on luay1985 video).
I have never install ios9 beta, (I only install ios 6 beta many years before).
"Reset all setting" doesn't help me.
On the second IPHONE and on IPAD of friends everything is ok.
And now I can't open game center, can't play game center games and can't open game center settings and can't exit from game center.
In the internet I found that in ios 9 developers change something in game center (merged some sandbox accounts or something like this I don't know).
I don't know what is sandbox accounts and I don't remember I use it or not.
see for more info (may be this is not about this problem)
https://forums.developer.apple.com/thread/13285
https://forums.developer.apple.com/thread/13287
Please, help
iPhone 4s, iOS 9