Fatal error: Uncaught Error: Call to undefined function add_shortcode() in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-search/includes/class-shortcode.php:8 Stack trace: #0 /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-search/includes/class-shortcode.php(82): EVOSR_shortcodes->__construct() #1 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-search/includes/class-shortcode.php on line 8