Fatal error: Uncaught Error: Call to undefined function add_action() in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-reviewer/eventon-reviewer.php:37 Stack trace: #0 /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-reviewer/eventon-reviewer.php(28): eventon_reviewer->__construct() #1 /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-reviewer/eventon-reviewer.php(161): eventon_reviewer::instance() #2 /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-reviewer/eventon-reviewer.php(164): EVORE() #3 {main} thrown in /users/laufgruppe-lvb/www/wordpress/wp-content/plugins/eventon-reviewer/eventon-reviewer.php on line 37