Connection failed, media server might be down or firewall might be blocking the

Hello

I am using AVChat Plugin for Video Chatting on domain
https://www.wcocwp.org/ using WordPress (PHP platform).
you need to login first with below credential.
username : smith
password : 123456

then open new tab this url : https://www.wcocwp.org/video-chat/

My site is hosted in network solution https://www.networksolutions.com/

When I am using AVChat Plugin then showing the error ” Connection failed, media server might be down or firewall might be blocking the connection!”.
This is media server error.

what should i do to remove this error. please help me.

If any one have same problem https://www.networksolutions.com/ so please help me also.

thanks

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