Hello support,
Every time I press “click here to activate” I get the “Cornerstone activated!” message, but then after a refresh or when any other tab is clicked I get the same message “You’re almost ready to start using X. Please click here to activate the required Cornerstone plugin.”
I also just received an email from Wordpress stating:
"Howdy!
Since WordPress 5.2 there is a built-in feature that detects when a plugin or theme causes a fatal error on your site, and notifies you with this automated email.
In this case, WordPress caught an error with your theme, X.
First, visit your website (https://vitalytennant.com/) and check for any visible issues. Next, visit the page where the error was caught [details=Summary] (https://vitalytennant.com/wp-admin/admin.php?page=x-addons-home&_cs_activate_nonce=836db17ab6) [/details] and check for any visible issues.
If your site appears broken and you can’t access your dashboard normally, WordPress now has a special “recovery mode”. This lets you safely login to your dashboard and investigate further."
Here are the error details from the email:
Summary
Error Details
An error of type E_ERROR was caused in line 239 of the file /home/vitalyte/public_html/wp-content/themes/x/framework/functions/updates/class-x-tgmpa-integration.php. Error message: Uncaught Error: Call to undefined method TGM_Plugin_Activation::get_tgmpa_url() in /home/vitalyte/public_html/wp-content/themes/x/framework/functions/updates/class-x-tgmpa-integration.php:239
Stack trace:
#0 /home/vitalyte/public_html/wp-content/themes/x/framework/functions/admin/markup/page-home-box-extensions.php(33): X_TGMPA_Integration->bulk_manager_url()
#1 /home/vitalyte/public_html/wp-content/themes/x/framework/functions/admin/markup/page-home.php(59): include(’/home/vitalyte/…’)
#2 /home/vitalyte/public_html/wp-content/themes/x/framework/functions/admin/setup.php(31): include(’/home/vitalyte/…’)
#3 /home/vitalyte/public_html/wp-includes/class-wp-hook.php(286): x_addons_page_home(’’)
#4 /home/vitalyte/public_html/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(’’, Array)
#5 /home/vitalyte/public_html/wp-includes/plugin.php(465): WP_Hook->do_action(Array)
#6 /home/vitalyte/public_html/wp-admin/admin.php(253): do_action(‘toplevel_page_x…’)
#7 {main}
thrown
Also the extensions aren’t showing (see attached img). 
Thank you for your support, I look forward to hearing from you and getting this resolved.