Hey, it happened to me last time......this is what i found out to solve my issue:
I create a new apple id and game center username (since i'm using an iOS) and unlink from my facebook account. I did a new apple id, a new game center username before but it happen again after I link to my facebook profile. Seems like the game developer block user based on its facebook user.
So I tried to make another new user and unlink to my facebook using this mod is fine until now. Can play PVP and use the cheat as normal.
Hope can solve your issue, happy shooting!! 😁