EDIT-2: Hmm, my other machine (i.e. my other Ubuntu-inside-VMware system) does not have the issue with the add-on. Very peculiar. Maybe it IS my own problem, although it just worked an hour ago...
EDIT-2: Hmm, my other machine (i.e. my other Ubuntu- inside- VMware system) does not have the issue with the add-on. Very peculiar. Maybe it IS my own problem, although it just worked an hour ago...