Fatal error: Uncaught Error: Class 'WP_Customize_Section' not found in /services/http/users/h/hes/wp-includes/customize/class-wp-customize-sidebar-section.php:17 Stack trace: #0 {main} thrown in /services/http/users/h/hes/wp-includes/customize/class-wp-customize-sidebar-section.php on line 17