Pop-up saying page can't be found while reading a story?

I linked a new story I wrote to a friend of mine and he keeps getting this pop-up as he reads it saying "Oops. Looks like this page can't be found." Everything is fine when he reloads the page but it soon pops up again. This surely can't be normal. Is this some fixable issue?

I'd hate to think this is happening to everyone reading my story.

Thank you for the report and sorry about the issue your friend reported.

Have you seen this popup yourself or do you have a screenshot of it so that I can try to understand what might be causing it?

I tested several of your stories in multiple browsers and I was unable to see the error.

Also, can you share the exact link where the problem occurs?

Thank you again.

Hey!
Glad to know it might just be him. Here's a screenshot of the message he receives. When he refreshes, it's ok for a while but then it happens again after a bit of reading. The link i gave him was this:
https://www.literotica.com/s/anothers-misfortune