You have some broken packages: https://launchpadlibrarian.net/369595119/VarLogDistupgradeAptlog.txt
and you have installed non ubuntu genuine packages (seen some from debian for example); so the first step is to made your install a pure ubuntu one, and downgrade version when required. Otherwise optin for a fresh install. ** Changed in: ubuntu-release-upgrader (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1770311 Title: 18.04 upgrade not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1770311/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs