Mail App on Mac unable to locate Google mailboxes "Mail was unable to open this mailbox on the server “p53-imap.mail.me.com”. The server returned the error: Mailbox does not exist

I know this question has previously been asked (Mail was unable to open this mailbox on t… - Apple Community) with a solution of "rebuilding" the mail box but that doesn't work for me. So reopening the subject to see if anyone has another solution to suggest.

I have dozen of rules and once I enable them I got a popup with the message for each rules. It makes it impossible to use rules in Mac Mail.

Any idea ?

Thank you

Patrick