Fatal error: Uncaught Error: Call to undefined function add_filter() in /home/ntjyolko/public_html/2learn/dev/wp-content/plugins/woocommerce/packages/woocommerce-admin/includes/connect-existing-pages.php:112 Stack trace: #0 {main} thrown in /home/ntjyolko/public_html/2learn/dev/wp-content/plugins/woocommerce/packages/woocommerce-admin/includes/connect-existing-pages.php on line 112