Fatal error: Uncaught Error: Call to undefined function add_action() in /home/httpd/vhosts/fussverkehr.ch/httpdocs/wordpress/wp-content/plugins/event-post/eventpost.php:327 Stack trace: #0 /home/httpd/vhosts/fussverkehr.ch/httpdocs/wordpress/wp-content/plugins/event-post/eventpost.php(18): EventPost->__construct() #1 {main} thrown in /home/httpd/vhosts/fussverkehr.ch/httpdocs/wordpress/wp-content/plugins/event-post/eventpost.php on line 327