Thanks. That confirms the problem is with 'Ubuntu Software' which comes from the 'gnome-software' source.
Sorry I don't know what exactly is wrong with it. ** Changed in: gnome-software (Ubuntu) Status: Incomplete => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1818944 Title: unable to remove or add apps To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1818944/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs