Proxy Detection Failed: PAC script error. HTTP Download failed. Connection failure.

A user connecting with Access Gateway was getting the error message

Proxy Detection Failed: PAC script error. HTTP Download failed. Connection failure.

Removed the Proxy configuration tick in the users Internet explorer LAN settings
This is a workaround, i think we also need to configure forwarding port 80 forwarding for the entry in the config script.
See CTX105540