Excellent job posting your Vicidial Version with build. However: you should also post your Installer with version. FYI.
The later versions of the installer will create a new form of firewall. Some of the "chains" in this new firewall have the ability to auto-add new entries based on activities. But that creates the issue: If your server is not whitelisted, you'll attract a lot of attention. So any blocking automation could result in a large number of entries. Since there is a 65k limit on the entires, that can fill up and refuse to allow more entries.
While this error can be ignored safely, it is an indication that you are drawing attention you may not want. You should consider whitelisting and blocking ping replies.
Happy Hunting!