[Solved] [v8.1.0] Mattermost Calls plugin not working

Troubleshooting
2

Gladly we could fix the problem. We had to set the following config setting (because our servers each have a management + productive IP):

"com.mattermost.calls": {
(...)
                "tcpserveraddress": "<productive IP>",
                "udpserveraddress": "<productive IP>",
(...)
            },