Nope. I have it now without that code and it looks like you can access game center from control center.
But I also found another problem, where none of my achievements and leaderboards work :D https://developer.apple.com/forums/thread/749677?page=1#784967022
darescore
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I use the Achievement ID and it is correct, I checked it multiple times :/
That error in the completion block is nil when I call to report the achivements
I tried that the other day but did not work. I will try again and see if I did something wrong because sample code app was no working as described in the info. 😕