Fatal error: Uncaught Error: Class 'WP_Customize_Section' not found in E:\www\flone\jogging\wp-content\themes\neve\inc\customizer\controls\simple_upsell_section.php:16 Stack trace: #0 {main} thrown in E:\www\flone\jogging\wp-content\themes\neve\inc\customizer\controls\simple_upsell_section.php on line 16