The link does not work for me, tried on 2 browsers. It worked fine a couple days ago but not now. Still error 404 message.

It looks like it had been deleted (likely by the author). You can message the author and ask them why. I was able to see it because I'm an administrator. I apologize for the confusion.

We will also look into a better message when content has been removed. A 404 is not very helpful.