Thread:Project:Support desk/404 error for just one edit window

There is just one page (and its talk page) in my wiki where the edit window won't load, giving a 404 error. I apologize for the fact that the page in question is a tad NSFW, so I'll just link it. There's nothing special about that page, at least nothing deliberate. It uses Template:Argument, which numerous other pages use with no problem (e.g. Governments should promote families). Thanks!