Fatal error: Uncaught Error: Call to undefined function add_filter() in /srv/users/vanderwijk-com/apps/vanderwijk-com/public/wp-config.php:44 Stack trace: #0 /srv/users/vanderwijk-com/apps/vanderwijk-com/public/wp-load.php(50): require_once() #1 /srv/users/vanderwijk-com/apps/vanderwijk-com/public/wp-blog-header.php(13): require_once('/srv/users/vand...') #2 /srv/users/vanderwijk-com/apps/vanderwijk-com/public/index.php(17): require('/srv/users/vand...') #3 {main} thrown in /srv/users/vanderwijk-com/apps/vanderwijk-com/public/wp-config.php on line 44