Validating license for my IP failed in the installation process

The problem might be on the ethernet device setting is incorrect.

You can check it in WHM -> Basic cPanel & WHM Setup -> Basic Config ->

“The ethernet device onto which new IP addresses are added. Devices detected with at least one IP are listed in the drop-down, or you may specify another device.”

Correct the device name and IP here to be matched with the IP in SSH. You can check the IP by SSH with the following command:

ifconfig

If shell displays:
eth0 Link encap:Ethernet
inet addr:111.222.222.111

In WHM should be:
ethernet device = eth0
IP = 111.222.222.111

Then you can check if the IP is matched by:
curl http://myip.cpanel.net/v1.0/

After correct this. You can run setup RV product again.