Error 404 — Not Found

Hello,
One of the posts that has recently been contributed to our site just went down all of the sudden. We didn’t install any plugins or anything. We posted it yesterday and we just started getting “Error 404 – Not Found” for that one post today.

All other posts work fine. Re-posting the same content, as a different post, worked for a few minutes before we started getting the error again. Re-saving permalink settings doesn’t do anything.

Any ideas? The post had a couple of images that could qualify as “racy” but there was no full nudity (bikinis). Maybe that’s the reason? Would appreciate any help.

The site is https://www.alienlion.com
The post in question is “Dead or Alive Sexist? Or Is It Actually Me?”