Oops. My mistake. You did say that, and I suppose my brain filled in my similar problem.
I do not use that package at all, but I tried it and it does not work for me either. If I am not mistaken, it is “software-properties-gtk”.
There is a another thread where this is being discussed, though my error is different than the original post there. I get
ERROR:root:Cannot import UbuntuDrivers: No module named 'UbuntuDrivers'
This bug has been reported here, which is also mentioned in one of the posts in that thread. I suggest monitoring both of those items.