Content page results in 404 errors in JavaScript menu

(I’m gonna assume that Meta is for “all things relating to” and not just the forum)

I found a bug of sorts.

I don’t remember which page had the link to it, but when I go here:

Then I can’t go to any other page in the JavaScript sidebar menu without getting a 404.

It seems that this is an older page that need to be removed from the site.

This page,

Has been replaced with this