Fatal error: Uncaught Error: Call to undefined function add_filter() in /users/robiniffert95/www/gustavguns/wp-content/plugins/woocommerce/packages/woocommerce-admin/includes/connect-existing-pages.php:123 Stack trace: #0 {main} thrown in /users/robiniffert95/www/gustavguns/wp-content/plugins/woocommerce/packages/woocommerce-admin/includes/connect-existing-pages.php on line 123