I was affected by the bug, found this bug report, followed the instructions to activate -proposed and used "sudo apt-get install ubuntu-release-upgrader-gtk/bionic-proposed" to update the python3-distupgrade, ubuntu-release-upgrader-core and ubuntu-release- upgrader-gtk packages, deactivated -proposed, tried updating, and the whole update process worked fine, but I got some Apport window that opened and complained about some bug just after clicking on the Update button, the one that previously didn't work. I'll include the error message that I got in the terminal.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799710 Title: 18.04->18.10: update-manager don't show upgrade page To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1799710/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
