We checked your server.
Seems like you've tried to update WCS to the latest build, but you've not stopped previous WCS process. Also, your server have 251 Gb RAM, and you've trying to launch WCS with Java Heap 220 Gb and Wowza with Java heap 200 Gb simultaneously. The sum 220 + 200 is more than 251, so this configuration cannot run as expected. Also, Wowza occupies RTMP port 1935, so streams cannot be played from WCS because it cannot bind this port.
So, we recommend the following:
1. Stop WCS manually
2. Set Java heap for WCS to 1/2 of server RAM
3. Set the proper file access permissions before restarting WCS
4. Clean old WCS logs
rm -rf /usr/local/FlashphonerWebCallServer/logs/*
5. Restart WCS
systemctl restart webcallserver
6. Do not start Wowza on the same server! Consider migration to another server instance. If, however, you prefer to run WCS and Wowza on the same server simultaneously, do the following:
6.1. Upgrade the server to at least 400 Gb RAM
6.2. Set Java heap for Wowza to 100 Gb
6.3. Set Wowza RTMP port to something different from 1935.
In this case, streams should be played from WCS as RTMP.