We do understand your frustration but please note that the tickets are answered from oldest to newest BUT bumping or posting new replies to your own thread will push your ticket to the back of the queue which is why your ticket is not getting any response while the other ticket which are posted around your first ticket were already handled.
So please be patient as it is our priority to attend to each ticket as fast as we can but we won't be able to do that if you keep on pushing your ticket at the end of the queue or posting a new thread every 5 minutes.
You can find more information about our Community Guidelines here:
Also, the other duplicate tickets that you posted will be closed to avoid confusion so kindly refer to this main thread.
Now as for the issue you are having, based on the error message you have included which is:
It seems that you only have Cornerstone installed on your site which you are trying to validate using your X license.
Kindly double check and make sure X is installed and enabled on your site then try to validate the theme.
In case the issue persists, please try to temporarily disable all the third party plugins that you are using. If you have some customizations assigned to the plugins, please make sure to keep a full backup of your site in case you will need it.
If all of these fails, please provide us with the license you are trying to use to validate and the admin details of your site in a Secure Note (key icon below your response) so that we could assist you further.