InDesign giving error while exporting PDF "The document page size exceeds the page size range"

Hello!

I'm trying to export a file to a PDF however, InDesign keeps saying that "the document page size exceeds the page size range supported in PDF files".
However, the pages are only 1280p x 720p (44 pages), which is the range for PDFs.

I've tried restarting the program and my computer,
updating InDesign
exporting as a IDML and trying from there
and trying to export as a PDF to Illustrator (however, this crops my spreads). 

I was wondering if anyone else might know how to fix this?
Thank you!! 

{Renamed by MOD}