There was an error when the upgrade process was communicating with the mirror of the Ubuntu archive which you use. Please try the upgrade again and see if the mirror is working better, if not I'd suggest switching mirrors of the Ubuntu archive.
2021-05-02 13:22:33,988 DEBUG examining: 'deb http://mirrors.piconets.webwerks.in/ubuntu-mirror/ubuntu/ groovy main restricted' 2021-05-02 13:22:33,989 DEBUG verifySourcesListEntry: deb http://mirrors.piconets.webwerks.in/ubuntu-mirror/ubuntu/ hirsute main restricted 2021-05-02 13:22:33,989 DEBUG url_downloadable: http://mirrors.piconets.webwerks.in/ubuntu-mirror/ubuntu//dists/hirsute/Release 2021-05-02 13:22:33,989 DEBUG s='http' n='mirrors.piconets.webwerks.in' p='/ubuntu-mirror/ubuntu//dists/hirsute/Release' q='' f='' 2021-05-02 13:22:34,008 DEBUG error from httplib: 'HTTP Error 500: Internal Server Error' ** 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/1926872 Title: Upgrade from 20.04 to 21.04 CRASH To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1926872/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
