recreating the account worked (after the login.ubuntu.com page, I got redirected to the accounts.google.com page to allow thunderbird to access mail & calendar, that was not happening with my existing account after the package update)
recreating the account worked (after the login.ubuntu.com page, I got redirected to the accounts.google.com page to allow thunderbird to access mail & calendar, that was not happening with my existing account after the package update)