Fatal error: Uncaught Error: Call to undefined function register_widget() in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventON_ALT/includes/class-evo-wp-widgets.php:11 Stack trace: #0 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventON_ALT/includes/class-evo-wp-widgets.php on line 11