Fatal error: Uncaught Error: Call to undefined function add_action() in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/so-widgets-bundle/base/inc/widget-manager.class.php:16 Stack trace: #0 /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/so-widgets-bundle/base/inc/widget-manager.class.php(28): SiteOrigin_Widgets_Widget_Manager->__construct() #1 /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/so-widgets-bundle/base/inc/widget-manager.class.php(177): SiteOrigin_Widgets_Widget_Manager::single() #2 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/so-widgets-bundle/base/inc/widget-manager.class.php on line 16