I'm trying to use pdfset to combine pdf files, and I'm getting this error: Error reading external PDF from https://xxxxxxxxxx.app.netsuite.com/core/media/media.nl?id=7894&c=5151617_SB1&h=gx2oNcQxFu-i2_20y2dZBkFbFaRj3uBpfVi5iwL19b98YDMb The file exists in the file cabinet. And in the template I'm entering the correct urls for those files:

<?xml version="1.0"?>
<!DOCTYPE pdf PUBLIC "-//big.faceless.org//report" "report-1.1.dtd">
<pdfset>
  <pdf src="<https://xxxxxxxxxx.app.netsuite.com/core/media/media.nl?id=7894&c=5151617_SB1&h=gx2oNcQxFu-i2_20y2dZBkFbFaRj3uBpfVi5iwL19b98YDMb>" />
  <pdf src="<https://xxxxxxxxxx.app.netsuite.com/core/media/media.nl?id=7363&c=5151617_SB1&h=-EbGbJlGJ346A2DNt6C7S31ELWc8VwDg-5UP-CJb4GQr1xTy>" />
</pdfset>