Thank you for the hints, Brian! There are some things I noticed which may have lead to the error:
- I had packages installed from 20.04 already - packages from bionic were pinned to lower priority The upgrade succeeded after removing the pin. This issue can be closed I guess. ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1921593 Title: do-release-upgrade fails with no error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1921593/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs