I had Software & Updates set to use the Australian server. I switched to the main server and the update proceeded without problems.
IMHO this is NOT a matter for the support sites, but for whomever it concerns (at Canonical, I presume) to get the people maintaining the Australian server to do what they need to do. Providing a mirror is very commendable, but brings with the OBLIGATION to keep it up-to-date and no excuses accepted. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1914846 Title: cannot upgrade from 16.04 to 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1914846/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs