Try to enable the javascript, if it help to authenticate with the server.
I'm using a linux O.S and my mozilla browser is blocking some pop-up ads and disabling javascript by default.
it is not working if the web server can't communicate with the browser basically its an IP addy to IP addy communication.

P.S When I let the javascript run for a specific website I can communicate with the web server, lets put the main issue that way now.