I can confirm the remedie of removing all other users except one from the sudo group (see psychotrain65 from 2020-06-14):
I had two users as sudo. I removed them alternately. As long as I had only one user in sudo everything worked as expected. It did not matter which user. As soon as two users were in sudo the admin-user action failed. Why does Lubuntu support one user in sudo only? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875774 Title: Lubuntu 20.04 lxqt-admin-user Action (usermod) failed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lxqt-admin/+bug/1875774/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
