Fatal error: Uncaught Error: Call to undefined function wp_next_scheduled() in /var/www/rikketina.dk/public_html/wp-content/plugins/wp-cerber/wp-cerber.php:513 Stack trace: #0 /var/www/rikketina.dk/public_html/wp-includes/class-wp-hook.php(298): cerber_init('') #1 /var/www/rikketina.dk/public_html/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array) #2 /var/www/rikketina.dk/public_html/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /var/www/rikketina.dk/public_html/wp-settings.php(326): do_action('plugins_loaded') #4 /var/www/rikketina.dk/public_html/wp-config.php(88): require_once('/var/www/rikket...') #5 /var/www/rikketina.dk/public_html/wp-load.php(37): require_once('/var/www/rikket...') #6 /var/www/rikketina.dk/public_html/wp-blog-header.php(13): require_once('/var/www/rikket...') #7 /var/www/rikketina.dk/public_html/index.php(17): require('/var/www/rikket...') #8 {main} thrown in /var/www/rikketina.dk/public_html/wp-content/plugins/wp-cerber/wp-cerber.php on line 513