If you get the following message on Mac mail

*"The IMAP command “UID COPY” (to Deleted Messages) failed for the mailbox “INBOX” with server error: UID COPY failed Deleted Messages: no such mailbox.*"

Go to mail Preferences... --> Accounts --> Your IMAP Account --> Mailbox Behavior Tab --> UNCHECK "Move deleted messages to the trash mailbox."

This should resolve the issue.