Azure Marketplace - Unreal Engine Pixel Streaming

I have made a deployment with the updated template, however I am getting the “Starting connection to server, please wait” message/screen and it never progresses. In the console I am continually getting new “logged aggregated metrics to Application Insights” console logs and that’s it, eventually it times out and resets/restarts connection.

Is there something I may have done wrong in my app that could cause this?