You may receive Invalid License File error after changing the Hostname value of your Linuxserver or after reloading operation System. It is because changing hostname will invalidate the associated cPanel license.
As a solution, you should validate cPanel license again by running following command through SSH:
/usr/local/cpanel/cpkeyclt
This command will update or refresh cPanel license with new hostname specified.
Accuwebhosting.com
As a solution, you should validate cPanel license again by running following command through SSH:
/usr/local/cpanel/cpkeyclt
This command will update or refresh cPanel license with new hostname specified.
Accuwebhosting.com