Talk:Friends/@comment-25175720-20161001174057

I have confirmed with BFS that you can no longer add friends via the game center. Here's what they said.

The invite button within the game only allows you to send an invite for someone to play the game. It cannot be used to invite people to be your friend in the game. You can only add friends through Facebook, not directly through the game. You can no longer add them through Game center since they have removed the app.