I was able to upgrade to 20.04.1 after deinstallation of nodejs from nodesource. See comment #2 https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1889250/comments/2 in bug #1889250 https://bugs.launchpad.net/bugs/1889250 .
I was able to upgrade to 20.04.1 after deinstallation of nodejs from nodesource. See comment #2 https:/ /bugs.launchpad .net/ubuntu/ +source/ ubuntu- release- upgrader/ +bug/1889250/ comments/ 2 in bug #1889250 https:/ /bugs.launchpad .net/bugs/ 1889250 .