OLD FORUM - Use new one: https://www.CaptainCasa.online/forum

(from mail conversation)

Scnearios with WebSocket-Polling (component WEBSOCKETPOLLING) were not properly working with IE. When activating the client-side logging ("?cclogactive=true") then you saw a "SecurityException" when opening the websockets. - No problems with Firefox, Chrome.

Problem: IE has some problems... A good source for solutions was found here: https://stackoverflow.com/questions/15114279/websocket-on-ie10-giving-a-securityerror

The core solution was "...disable IE's automatic algortihm for recognizing local sites...".