All kinds of false warning messages in calendar app
I’d like the messages gone. That’s that.
iPhone 8 Plus, iOS 13
Question marked as
If running iOS 13 or earlier versions, check: Settings - Passwords & Accounts - Accounts - Any rogue entries here? If so, delete the rogue account.
If running iOS 14, check: Settings - Calendar - Accounts - Any rogue entries here? If so, delete the rogue account.
The Apple support article is below.