Fatal error: Uncaught Error: Call to undefined function add_action() in /home/america2/public_html/wp-content/plugins/klaviyo/includes/wck-added-to-cart.php:13 Stack trace: #0 {main} thrown in /home/america2/public_html/wp-content/plugins/klaviyo/includes/wck-added-to-cart.php on line 13