Fatal error: Uncaught Error: Class "WP_Widget" not found in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/so-widgets-bundle/base/siteorigin-widget.class.php:8 Stack trace: #0 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/so-widgets-bundle/base/siteorigin-widget.class.php on line 8