The links to display a mythological figure and to add new figures have been broken for a very long time. Today we fixed those, and also updated the look of the pages. Here is the old look (ah, nostalgia):
And here is the new look:
So if you would like to help us beef up our content on mythology, get to uploading! Upcoming changes in this area include pages to manage mythological places, linking mythological figures to their depictions in art, and eventually other content sections such as literary references.