Pulldown Menu Not Working - X Customizer.PHP /Cornerstone Error

I’m getting the following error to https://halprince.com following the latest update to Cornerstone 10.5 that is preventing the pulldown menu from working.

Error Details

An error of type E_ERROR was caused in line 36 of the file /var/www/wp-content/themes/x/framework/legacy/functions/admin/customizer.php.
Error message: Uncaught Error: Call to undefined function cornerstone() in /var/www/wp-content/themes/x/framework/legacy/functions/admin/customizer.php:36

Stack trace:
#0 /var/www/wp-includes/class-wp-hook.php(308): x_customizer_manage_theme_options_button(’’)
#1 /var/www/wp-includes/class-wp-hook.php(332): WP_Hook->apply_filters(NULL, Array)
#2 /var/www/wp-includes/plugin.php(517): WP_Hook->do_action(Array)
#3 /var/www/wp-admin/customize.php(174): do_action(‘customize_contr…’)
#4 {main}

WordPress version 6.1.1
Active theme: X (10.5) Child Theme (version 1.0.0)
Current plugin: (version ) PHP version 8.0.26

There is a new version of Cornerstone, which I installed yesterday but it broke my site, so I’ve restored it.

Please advise.


X and Cornerstone needs to be updated together and that’s most likely what this issue is. So in your account download Cornerstone 7 (since your site is already on x10) and upload that in your plugins area and you should be fine. Let us know if you have any questions! Have a great day.

That did the trick! Thanks so much.


You are most welcome, Marj.