Fatal error: Uncaught Error: Call to undefined function add_action() in /var/www/eintrachtpodcast/wp-content/plugins/wp-super-cache/inc/preload-notification.php:29 Stack trace: #0 {main} thrown in /var/www/eintrachtpodcast/wp-content/plugins/wp-super-cache/inc/preload-notification.php on line 29