Can't add purchase code to my account

I enter the code into the WP Admin page, it asks me to log in to Themco, I get this splash page, then I get redirected to an error page

Hey Matthew,

Thanks for writing in! Could you please provide the purchase code in the secure note so that we can check it?

To know how to create a secure note, please check this out: How The Forum Works

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Best Regards.

Error upon activation


I have attached the purchase code in the secure note.

Hey Matthew,

The X theme license code is already added in your Themeco account. Be advised that you cannot use your X theme license to validate Cornerstone as a standalone plugin. Please make sure that the X theme is activated by going to Appearance > Themes.

Best Regards.