Pop up not working on Custom page

Hello,

I’m using WooCommerce Food – Restaurant Menu & Food ordering (https://codecanyon.net/item/woocommerce-food-restaurant-menu-food-ordering/25457330) on my website. I want to make sure this plugin works with woocommerce food before i purchase pro. As of now, On a custom page it’s not working. Can you please help me with this?