If you have ACF installed, they added a setting to disable Core’s Custom Fields to try to speed up editor page load time. To disable you can use this filter:
add_filter('acf/settings/remove_wp_meta_box', '__return_false');
If you have ACF installed, they added a setting to disable Core’s Custom Fields to try to speed up editor page load time. To disable you can use this filter:
add_filter('acf/settings/remove_wp_meta_box', '__return_false');