Error 'Can't connect to the account "iCloud". Enter the password for user "".'
I'm at a loss - I've rebooted, reconnected - am receiving email - but when I try to send I get an error pop-up with this message "Can't connect to the account "iCloud". Enter the password for user "". "
Thank you for any suggestions/ideas!
Alice
MacBook Pro 13″, macOS 10.12