This error may occur if something went wrong when authenticating using Sign in with Apple
Error Code 1000 for Sign in with Apple refers to an unknown error that occurred authenticating your Apple ID. Please make sure that you have Two-Factor authentication enabled for your Apple ID.
If you're experiencing this issue, please try to force close and relaunch the app. Repeat the sign in process. If this doesn't resolve the issue, please contact the Support Team and firstname.lastname@example.org