Chat is offline, even in localhost tabs
I tried the app to use its chat feature. When I enter localhost/video-chat-app and press 'Create Room' and 'Enter Room', and I am redirected to a new tab. The problem is that the chat is offline and the following message is displayed "Unable to connect to the chat server! Kindly refresh". When I copy and paste the URL in another tab or even check it on a different computer (e.g http://172.30.2.33/video-call-app/comm.html?room=s79md5385ef) I do not see messages in other window as the status is offline.
I have also made the IP address adjustments as per the Wiki but still I am unable to get it working either in localhost or on LAN. 

Here is the error shown in the console:
`WebSocket connection to 'ws://172.30.2.33:8080/comm' failed: Error in connection establishment: net::ERR_CONNECTION_REFUSED
WrappedWebSocket @ blob:http://172.30.2.33/de2a32bd-f36d-49df-a4bf-b0b87fe8fa30:164`

Thanks.