Most likely you are running into a problem that has been lingering on FANDOM for a few weeks. You may need to wait at least an hour to see your menus update. Also, since this is a small UCP wiki, it could take longer. Your code looks fine.
I would wait about 4 hours and if nothing shows up, report a problem to FANDOM staff via "Contact us". It would also help if you posted the reply you get from FANDOM staff here in this thread.