Cannot add an existing gmail account to thunderbird (1:102.7.1+build2-0ubuntu0.22.04.1) even though I have two others that were created without a problem. I examined the differences in the configuration of the TB account data and It is identical to the other two gmail accounts except name, login, and the assignment of a trash folder. I selected Advanced settings and forced the addition of the account to TB yet was unable to create folders such as Trash as TB said they already exist even though they are not shown. The only folder shown in the forced account is Inbox. I included window snapshots for each step. I don't understand why the [email protected] account is not being added. The account works at mail.google.com via browser and on my iPhone. Please advise. Thanks.