Cannot register trial license

[Isaac Henderson]

Hello,
recently I have installed cPanel on my Centos 7 OS.
But when I tried to register trial license using /usr/local/cpanel/cpkeyclt it said :
Error message:
The cPanel license server said that a license could not be issued for your server (66).
For more information visit: lic | cPanel

The exact message was: No license entry found for your domain. (x.x.x.x)

I have a trial license available at verify.cpanel.net

I am completely sure my hostname is fine according to cPanel documentation.

I tried to submit ticket but it said :
The following error(s) have occurred:
IP address and support access ID do not match.
I have generated support ID using : /usr/local/cpanel/cpanel -S
and verified IP address using : curl -o - http://www.cpanel.net/showip.cgi

Any help will be great.

 

[Infopro]

You have to purchase the license first:
cPanel Pricing

 

[Isaac Henderson]

I have not used trial license yet.

I have checked using verify.cpanel.net :
Results: Not licensed

 

[Infopro]

You don't need to register a trial license to try cPanel.

 

[Isaac Henderson]

I know. I have used /usr/local/cpanel/cpkeyclt for using my trial license but it said :
The cPanel license server said that a license could not be issued for your server (66).
For more information visit: lic | cPanel

The exact message was: No license entry found for your domain. (x.x.x.x)

 

[Infopro]

I know. That's because it's a trial license. Unregistered trial license. When you purchase your license, it becomes registered.

 

[Isaac Henderson]

It means I cannot use 15 day trial license?! my WHM is currently inaccessible due to invalid license file.

 

[Infopro]

Check these troubleshooting tips to see if they're helpful:
How to Fix License File Errors - cPanel Knowledge Base - cPanel Documentation