"AttributeError: 'NoneType' object has no attribute 'cancel'" I think you found another way to hit this bug: https://bugs.launchpad.net/ubuntu/+source/calibre/+bug/1898904
-- You received this bug notification because you are a member of Edubuntu Bugsquad, which is subscribed to calibre in Ubuntu. https://bugs.launchpad.net/bugs/1899700 Title: [Regression] Does not return cover To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/calibre/+bug/1899700/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~edubuntu-bugs Post to : edubuntu-bugs@lists.launchpad.net Unsubscribe : https://launchpad.net/~edubuntu-bugs More help : https://help.launchpad.net/ListHelp