Error when saving to PDF

When trying to save a PDF by going to File > Print > PDF > Save As PDF
It’s not working. I keep getting results like this:

This only started recently, as I’ve never had this issue before. Not sure what’s going on.

I’m in Axure RP 9
macOS Mojave, Version 10.14.6


Hi AJ,

Just confirming we’ve received and responded to your email with some questions to help identify what’s causing the PDF issue!