This is due to some changes in the database structure,so this is a temporary problem. Delete ~/.local/share/postler/mail/index.db and restart postler to re-create the database (you can use this if there will be some other changes in the near future)
This is due to some changes in the database structure,so this is a temporary problem. share/postler/ mail/index. db and restart postler to re-create the database (you can use this if there will be some other changes in the near future)
Delete ~/.local/