Your host name must resolve to the correct IP address – VPS Ubunty – Plesk WebPanel FIX
We have more and more users complaining about the hostname error while installing Plesk Web Panel.
There is an easy fix which you can apply in order to fix the hostname error.
Error Message :
Your host name must resolve to the correct IP address of your server, unless you are using network address translation (NAT).
Please quit Parallels Installer, fix the host name resolution problem,
and then try installing again.
You can skip the hostname check and continue the installation, however,
in such a case, the installer cannot guarantee successful installation.
To apply this fix edit your /etc/hosts file with your desired editor and add your hostname.
And try to run the Plesk Installer again.
Let us know in the comments if this worked for you.