Custom Error Page
There has been some kind of mistake

This is my custom error page.

The only reason you are here is that the Internet must have made some kind of mistake. There is no chance of me making a mistake. Ha.

I think we both know you have not made any mistakes. So let's just blame the Internet.

Have you considered making your own custom error page?

This is something your web host provides. Instead of a nasty, generic 404 error page, send your visitors to an error page you create.