After your package information was updated the essential package 'ubuntu-minimal' can not be found anymore.
This indicates a serious error, please report this bug against the 'update-manager' package and include the files in /var/log/dist-upgrade/ in the bug report.
After your package information was updated the essential package 'ubuntu-minimal' can not be found anymore. dist-upgrade/ in the bug report.
This indicates a serious error, please report this bug against the 'update-manager' package and include the files in /var/log/