This Apple ID is either not valid or not supported
I have sign out and try to login again this error is displaying
iPhone 11
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There is no Apple Support document specifically addressing this message that I can find but these links have been Recommended by Apple ( https://discussions.apple.com/thread/7417834 ) and others with this problem:
If your Apple ID is locked or disabled --> https://support.apple.com/HT204106
Contact Apple for help with Apple ID security --> https://support.apple.com/HT204169