It’s a good game but I’m having some problems – Star Girl: Beauty Queen Review

When I try to link my Facebook to it so I can get my account on another device it just says “app not setup this app is still in development mode and you don’t have access to it switch to a registered test user or ask a app admin for permissions” and i don’t know if this app is just that old and no ones taking care of it anymore or y’all are working on it or something but it is slightly upsetting cause I had a lot of stuff on it on my old Device
Review by please help fix this problem on Star Girl: Beauty Queen.