Why isnt my game center working? I try to link it to some of my games and it doesnt work.
Why isnt my game center working?
These are not the GC forums your are looking for.
As iOS 11 is now public, user-centric queries/comments such as this are perhaps best put to Apple's public community support forums, run by AppleCare, and/or Apple's twitter support account, vs. risking off-topic here in the DevForums, thanks and good luck.
Users can feedback via http://www.apple.com/feedback/ - Individuals using betas are free to use the Feedback Assistant; devs can use the 'Report Bugs' link, below right.