Fatal error: Uncaught Error: Class "Elementor\Widget_Base" not found in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/ubermenu/includes/elementor/widgets/nav-widget.php:3 Stack trace: #0 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/ubermenu/includes/elementor/widgets/nav-widget.php on line 3