I’m trying to put a link at the top of the Marfa theme to a category. The new category links on the archive page have the address "/categories/topic". If I try and save a page with that link the "/categories" part is stripped out making the url fail. Am I going about this the right way?

edit (2-2-2019): I was going about it the wrong way. All you need to do is add the full url as the contents of the page.