After a restart yesterday due to a Bluetooth problem, I suddenly found I couldn't Facetime (as I do nearly every day) without a sign-in. That alone didn't bother me - I entered my Apple ID, password + 2FA digits, but got the message "The server encountered an error processing registration...", even after restoring every component with yesterday's date containing "facetime" via Time Machine, from 3 days ago.
How do I get FT back to how it was?
How do I get FT back to how it was?