How to disable the Network Manager service. The Network Manager service automates the network’s settings and disrupts connections to the IP addresses that reside in the ipaliases module.
You must disable the Network Manager service and enable the network.service service before you install cPanel & WHM.
To go around this issue, you need to deactivate your network manager in these simple steps:
systemctl stop NetworkManager.service
systemctl disable NetworkManager.service
Now try to install cPanel.