InDesign 2021 crashes when exporting Book file (indb) to interactive PDF.

Hi,

I'm trying to export a multi-document book from InD to an interactive PDF

Using: InDesign 2021 (v. 17.1) on iMac 27, Monterey (12.3.1)

Problem: InD crashes when exporting from Book pane to PDF.

• The new book is compiled from several updated InD files (book sections), with multiple internal and external hyperlinks in each.

• No buttons or other interactive elements.

• Preflight for each InD file is green

• There is no issue exporting individual InD files straight to print interactive PDF

• Crash occurs when exporting single files within the book, as well as multiples

The original Book was created years ago and updated successfully twice in the interim, with older versions of InD.

I urgently need help with troubleshooting. Many thanks in advance.