There seems to be something strange with your httplib library given the following error from VarLogDistupgradeMainlog.txt:
2019-04-23 12:56:31,218 DEBUG examining: 'deb http://ftp.acc.umu.se/ubuntu/ xenial-updates main universe multiverse restricted' 2019-04-23 12:56:31,219 DEBUG verifySourcesListEntry: deb http://ftp.acc.umu.se/ubuntu/ bionic main universe multiverse restricted 2019-04-23 12:56:31,219 DEBUG url_downloadable: http://ftp.acc.umu.se/ubuntu//dists/bionic/Release 2019-04-23 12:56:31,219 DEBUG s='http' n='ftp.acc.umu.se' p='/ubuntu//dists/bionic/Release' q='' f='' 2019-04-23 12:56:31,436 DEBUG error from httplib: 'HTTP/' 2019-04-23 12:56:31,436 DEBUG entry '# deb http://ftp.acc.umu.se/ubuntu/ xenial-updates main universe multiverse restricted' was disabled (no Release file) You might be able to work around this by setting the following environment variable when calling do-release-upgrade e.g.: RELEASE_UPGRADER_ALLOW_THIRD_PARTY=1 do-release-upgrade ** 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/1825978 Title: Xubuntu 16.04.6 upgrading to 18.04.2 error: essential package 'ubuntu- minimal' could not be located To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1825978/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
