I submitted an iOS 8.1 Swift iPhone app for TestFlight beta testing as well as AppStore review. It is using Game Center and everything works fine IF we enable "Sandbox" mode on the phone. However, now it needs to work in production, and I keep getting error indicating that the App is not recognized by Game Center.
I am NOT using a beta version of any software. Opened a case with Apple as well, but wanted to ask SO users how they switched to production Game Center environments. Please help.
By the way I already tried this and other such ideas with no luck.