X Theme License Key won't validate

[johnhigginsonphotogr]

I recently cloned my WP / X Theme site and when I try and add a newly purchased license for X theme it won’t validate.
Once I input the key in the required box on my dashboard and then hit enter I’m redirected to a blank white page / screen.
The URL ends wp-admin/admin.php?
Any help would be appreciated
Thanks

[jade]

Hi there,

Please double check if you have the latest version of X and Cornerstone installed since having older version for either of them might cause some issues.

Here is a link for a details information on how to do an update:

How to Update | Themeco Docs

Please remember to clear all caches when updating so that the code from the latest release is always in use. This will help you to avoid any potential errors or any unexpected display issue on the site.

If you already have them updated try disabling all your plugins then try the validation.

If the issue persists, try increasing the PHP memory limit of your site.

To do this, please edit your wp-config.php file and insert these lines:

define( 'WP_MEMORY_LIMIT', '256M' );
define( 'WP_MAX_MEMORY_LIMIT', '512M' );

You can add it before the line
/*That's all, stop editing! Happy Blogging. */

In case the issue persists, please try to get in touch with your hosting provider and confirm to them that your PHP memory limit is increased.

If you are still having an issue, please provide us with the admin details of your site in a Secure Note so that we can check this further.