Having an issue connecting to pdfjs.express from one of our servers, getting Failed to fetch errors. Our firewall team needs to open access, Which IP address do we need to allow connectivity to?

Which product are you using?

PDF.js Express Version

Detailed description of issue
Having an issue connecting to pdfjs.express from one of our servers, getting Failed to fetch errors. Our firewall team needs to open access, Which IP address do we need to allow connectivity to?

Expected behaviour
Viewer to show the pdf file.

Does your issue happen with every document, or just one?
All documents.

Link to document
{Provide a link to the document in question if possible}

Code snippet
We are using the viewer library to authenticate lisense key.

Hello lunga.vazi,

What fetch request are you doing?
If you are using the REST API it should be:

https://api.pdfjs.express

Best regards,
Tyler