You can set
continue_on_chapter_error true for that story.
Code:
[https://forums.spacebattles.com/threads/my-friends-worm.279038/]
## Because some adapters can pull chapter URLs from human posts, the
## odds of errors in the chapter URLs can be higher for some
## sites/stories. You can set continue_on_chapter_error:true to
## continue on after failing to download a chapter and instead record
## an error message in the ebook for that chapter.
continue_on_chapter_error:true