I have an exclamation point in a yellow triangle in one chapter in the book panel. How do I get rid of it? There are no preflight errors. I keep re-synchronizing the book and it doesn't help. I opened the chapter and re-saved, and it didn't help. I can't even figure out what it's trying to warn me about.
It might be that a page(s) were added or removed.
Try updating the Page Numbering.
Do you have a TOC? if so update that.