When I go to Settings / iCloud, my AppleID is there, but when I tap the disclosure triangle/icon (>), iOS asks me my to "Sign in with Apple ID" (i.e., enter password for my Apple ID).I enter the password but get the error message/alert:
Title: Verification Failed
Message: An unknown error occurred
Buttons: Cancel / Try Again
I tried updating my password at MyAppleID, to no effect.
I have 2-step verification enabled.