Fatal error: Uncaught Error: Call to undefined function add_action() in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/so-widgets-bundle/base/inc/fields/siteorigin-widget-field-class-loader.class.php:131 Stack trace: #0 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/so-widgets-bundle/base/inc/fields/siteorigin-widget-field-class-loader.class.php on line 131