How do I fix a hostname error in cPanel?
The following article explains how to fix a hostname error in cPanel. This error generally means that a hostname record was not added for the server name. To fix this, you will need to contact support and request a hostname record be added for your VPS.
As an alternative, you can update the hostname of the VPS to a fully qualified domain name.
To update the hostname to a fully qualified domain name, please follow these steps:
Open a web browser and connect to your cPanel Control Panel located at https://ip address:2087.
Login as the Administrator using the information sent to you in your setup email.
From the menu, under Networking Setup, click Hostname.
Enter a fully qualified domain name as the new Hostname and click Change.