Thank you for reporting this bug and make ubuntu better! Please try ppapurge all your external added packages and ppa's yourself manually first
and sudo apt update && sudo apt full-upgrade then try again the lts upgrade -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1901985 Title: I tried to upgrade from 18.04 to 20.04, but get an error: Could not calculate the upgrade. All 3rd party packages are disabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1901985/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
