{{iframe}} doc view error

Hi, Seems that the function to embed in {{iframe}} a doc that is stored in WorkDocs is not working anymore. But the issue is not the embed but seems that the doc can't be opened by the function.

{{iframe url="https://amazon.awsapps.com/workdocs/pdfjs/viewer.html#/documentid=docID.from.workdocs" width="900px" height="900px";}}{{/iframe}}

Any fix for this or advice?

error message: "We weren't able to load this document. Please try again later."