It sounds like something on your site is breaking Javascript, and this in turn means that nothing else can run on your site including PDF Embedder.
There are some suggestions for diagnosing the problem here:
https://wp-pdf.com/kb/pdf-doesnt-appear-at-all-just-a-blank-line-or-hangs-on-loading/
But please just feel free to send me a link to the page on your site containing the ‘broken’ PDF and I will take a look: email contact@wp-pdf.com.
Please note I may not pick up replies here, so please do email.
Regards,
Dan
