WebSocket connection to wss failed

We have setup openvidu in local enviornment. Machine is not accessible from outside for network. So to run video conferencing feature we have created apache web server that is accessible from outside. In this apache server we have used proxypass setting to access openvidu functionality from customer end.
IP of Openvidu server - 192.168.13.198. This machine has access of local network only.
IP of apache server is public. Customer can access this IP.
Settings in apache server -
ProxyPass /openvidu http://192.168.13.198/openvidu
ProxyPassReverse /openvidu http://192.168.13.198/openvidu

After these settings we are able to use openvidu’s api.
Only error we are getting related to wss call.
Error coming "WebSocket connection to ‘wss;//192.168.13.198/openvidu’ failed.

Please help what settings need to be done in openvidu server. We are stuck with this and not able to make connection with client.

Please do help. Badly stuck with this.