Fatal error: Uncaught Error: Call to undefined function add_action() in /var/www/noteswp.new/wp-content/plugins-backup/yith-woocommerce-wishlist/plugin-fw/lib/promo/yith-promo.php:15 Stack trace: #0 {main} thrown in /var/www/noteswp.new/wp-content/plugins-backup/yith-woocommerce-wishlist/plugin-fw/lib/promo/yith-promo.php on line 15