17:07:40 error [window.async-connection] : receive broadcast failed
TypeError: _2c6.contentAsDOM() has no properties
I think I found the problem!!
It works for me!
I removed the jetty-util-6.0.1.jar from my lib directory and I don't have the "receive broadcast failed " error anymore. All works fine.
So if you have this jar in your lib directory try to remove it.
Hope it helps!