I saw this error message in the terminal from which I launched software- properties:
$ software-properties-gtk ERROR:root:Authentication canceled, changes have not been saved ** Changed in: software-properties (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1720517 Title: Software and Updates /Other Software greys out when clicking on "Canonical Partners" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/1720517/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs