I can specify, what i was doing:
Settings Apple-ID/Profile Registration&Security Sign in with Apple Axis&Allies App Hide my E-Mail > manage Settings Axis&Allies App disable „Forword to (your e-mail)“Then A&A worked again.
Also, check out this interview with Trent:
https://www.youtube.com/watch?v=FSzN37SNGEo&feature=youtu.be
See you in the game!