I had forgotten I had submitted this bug report, and just encountered this same issue when I upgraded from 21.04 to 21.10. I reported my problem with this latest upgrade on the Ubuntu Mate Community forum. At least I'm consistent: the post there reads almost exactly like my bug report here. :)
See details here: https://ubuntu-mate.community/t/prompt-to-upgrade-21-04-to-21-10-does- nothing/24672 This is a little disheartening that the same issue continues 2 1/2 years later. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799319 Title: Upgrade to 18.10 fails: Please install all available updates To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1799319/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs