Compare tool not showing differences

Product:
PDF Web Viewer

Product Version:
8.1.0
Please give a brief summary of your issue:
(Think of this as an email subject)
Comparison of two documents aren’t shown

Please describe your issue and provide steps to reproduce it:
(The more descriptive your answer, the faster we are able to help you)
When comparing two files it doesn’t show the differences , it shows a blank page:

this was working, then with no changes to our system this is now not working. the oly thing i can see is this this URL is no longer accessible:

https://unpkg.com/uuid@9.0.0/dist/umd/uuidv4.min.js

Please provide a link to a minimal sample where the issue is reproducible:

Hi There,

Thank you for contacting WebViewer support.
Can you please share the two files you’re trying to compare so we can analyze your case better, please?

Best,

Dandara Navarro
Web Software Developer
PDFTron Systems, Inc.