Form Recognizer shows 'unable to load asset' on PDFs. I have tried multiple PDF's from various sources and they all return this error. JPGs work as expected.
An additional error popped up
Uncaught NetworkError: Failed to execute 'importScripts' on 'WorkerGlobalScope': The script at 'http://fotts.azureedge.net/npm/pdfjs-dist/2.3.200/pdf.worker.js' failed to load
What Form Recognizer sample tool version are you using ? Do you get this error also on the latest release - http://fott-2-1.azurewebsites.net/