yes it does happen with the gmail backend at least, I just started thunderbird from terminal and it gave this error if it helps (I also have attached a screenshot of the notification alert)
(thunderbird-bin:4468): libebook-WARNING **: e_book_client_new: Cannot get book from factory: Invalid source
yes it does happen with the gmail backend at least, I just started thunderbird from terminal and it gave this error if it helps (I also have attached a screenshot of the notification alert)
(thunderbird- bin:4468) : libebook-WARNING **: e_book_client_new: Cannot get book from factory: Invalid source