Create proof of concept for Zoom meeting running in ASP.NET web page

I’ve modified the CDN app but I can’t get it to join. I’ve searched the forums for this code. I’m using a free account which I assume is OK.

Join returns this:
{“method”:“join”,“status”:false,“result”:null,“errorCode”:1}

Popup appears immediately:
Title=Joining meeting timeout, Text=Your connection has timed out and you cannot join the meeting. Verify your network connectivity and try again. Buttons=Retry or OK buttons

My actions:

  1. Created JWT app, made a note of key and secret.
  2. Modified CDN app:
    3.[Code change] Set key & secret variable.
  3. [Code change] Uncommented call to: ZoomMtg.setZoomJSLib(‘https://source.zoom.us/1.7.4/lib’, ‘/av’); I’ve also tried the Cloudfront URL which is the one recommended on the integrate instructions.
  4. [Code change] Added userEmail property to ZoomMtg.join arguments
  5. Created meeting in MS Teams, verified that I can join it from Zoom website (Chrome).