I can't view other participant in JitMeet

Hi, all:

I have the same problem as what Indra had and posted as "I can't view other participant in JitMeet". Basically, I can see myself but not others in the session.

My server is hosted on an EC2-instance in Amazon clouding environment. I tried its host-name (internal-name in EC-2), EC2 external-name,  my public domain-name, they were not helpful.

I also check my chrome error logs from chrome's browser's inspect-elements. There is no any error messages and even no warning messages.

So far, have no clue on it. Just report it here and hopefully have any ideas or thoughts?

Thanks,