I had exactly the same problem, the system did not want to update in any way, and there were messages on the command line that such an update was not possible for some reasons. Therefore, I downloaded the .iso file with system 20.04.2 and installed the system again from this file.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1922232 Title: Unable to upgrade from Ubuntu 18.04 to 20.04.2 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1922232/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
