I installed Lubuntu 20.04 on a stick and added another user “pw_admin” which I want to use if a student forgets his password. I used the preinstalled “Users and Groups”. Then I logged out to log in with the new user to see if I could change the password which I couldn’t. But afterwards I couldn’t even change the password while being logged in as the original user anymore because I was not authorized. I couldn’t even download apps from discover anymore because I wasn’t authorized.
Firstly I thought I messed something up, downloaded the image again and created a new stick. The only thing I did was add an user and tried to change the password which ended in the same result. Everytime I try to add an user I lose all authorization. I even added both users to all groups through the terminal and sudo (even though I know that’s stupid because I really tried ALL groups). But no authorization to do anything.
How can I add an user without losing authorization to do anything?