What version of distro-info do you have installed? Do you happen to have a pip version of distro-info installed? There was an out of date version of distro-info in pypi that didn't have all the features of the one from the Ubuntu archive.
** Changed in: update-notifier (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1943638 Title: apt_check.py crashes with exception "AttributeError" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-notifier/+bug/1943638/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs