Books in TOC show as broken links, even though a topic is linked to the book
I don’t have much experience with RoboHelp, so I hope this turns out to have an easy fix. I’m using RoboHelp 2019 (14.0.3.019) to update an existing project that is linked to an existing FrameMaker document. The project was originally set to output to FlashHelp, but I was told to change to WebHelp.
The generated Help seems to be created properly, but I have a problem with the TOC. Every FrameMaker file that has lower-level headings is shown as a book in the TOC, as it should. But when you click on a book at any level, it displays a broken link.

If you click on a topic, the content is displayed properly.
However, if you right-click a book and select “Open book in new tab” or “Open book in new window”, you see the correct content. So the correct content is linked to the book; it just will not display directly.
I hope someone can help with this problem. I’d like to click on a book in the TOC and have the content displayed properly, as well as revealing its subtopics in the TOC.
