Fatal error: Uncaught Error: Class "WP_Widget" not found in C:\xampp\htdocs\wo\woocommerce\includes\widgets\class-wc-widget-brand-thumbnails.php:15 Stack trace: #0 {main} thrown in C:\xampp\htdocs\wo\woocommerce\includes\widgets\class-wc-widget-brand-thumbnails.php on line 15