I've been fighting this issue for 3 days now.
After several failures, I created a new app id and service id yesterday.
I checked and entered domain, callback, and login usage clearly, but it keeps returning an error. Can you help me figure out what's wrong?
We are facing the same problem, I think we need to wait apple to solve this problem.
apple is really in decline
no communication pathetic
also happening to us, both on iOS beta and release version
it's now fixed for me