Fatal error: Uncaught Error: Class 'WP_Widget' not found in /home/xavierdes/dev/wp-content/plugins/motopress-slider/includes/classes/SliderWidget.php:3 Stack trace: #0 {main} thrown in /home/xavierdes/dev/wp-content/plugins/motopress-slider/includes/classes/SliderWidget.php on line 3