Board Thread:Support Requests - Community Management/@comment-26228196-20150322025301/@comment--20150322030816

You added a category with the name "****"? You should be able to add that, I just tested it and it works. Sometimes, if a template on a page is interfering (not completely closed off at the end), it won't register the categories you add (happened to me lots of times). You can alternatively create the category page ("Category:****") and THEN add it to the page(s) you want.

Do you have an example of a page the category won't allow you to add it to?