Fatal error: Uncaught Error: Call to undefined function add_filter() in /var/www/vhosts/donnamoderna.com/httpdocs/wp-config.php:4 Stack trace: #0 /var/www/vhosts/donnamoderna.com/httpdocs/wordpress/wp-load.php(55): require_once() #1 /var/www/vhosts/donnamoderna.com/httpdocs/wordpress/wp-blog-header.php(13): require_once('...') #2 /var/www/vhosts/donnamoderna.com/httpdocs/index.php(17): require('...') #3 {main} thrown in /var/www/vhosts/donnamoderna.com/httpdocs/wp-config.php on line 4