When I try to assign a prerequisite for a module nothing happens. I click the prerequisite link and canvas does nothing. I do not get an error, but I get no options either. I am able to assign requirements for the module previous to the one I wish to assign a prerequisite for, but the prerequisite button/link doesn't seem to work at all.
Does something have to be available as part of the module, or does something else need to be finished, before a prerequisite can be added? If not, has anybody else had this problem?