Hi Don Juan,
I see that you’re using X on your site, but your license is for PRO. Please install PRO on your site instead but please deactivate Cornerstone plugin first to avoid conflict.
You can download the latest copy of Pro on your account dashboard, you can follow the guide here for installing theme.
Then validate your Pro theme.
Remember to clear all your caching features (plugin, server-side, CDN, and browser’s cache) after switching to Pro so that the code from the latest release is always in use. This will help you to avoid any potential errors.
Let us know how it goes,
Cheers!