I am having trouble getting the PDF embed API to work on my site. I keep encountering the message "File Preview Not Available" with any PDF file I try. The domain is a test site I created with Weebly https://corporatesampleintranetpage.weebly.com/.
The URL you are pointing to is not a direct link to a PDF. It is a link to a view of the PDF file stored in Document Cloud. At the time of this writing, there is no method of accessing the bytes of a PDF or creating a direct link to a PDF stored in Adobe Document Cloud. You'll need to host your PDF file somewhere else.