Somehow your site is not loading “wc_add_to_cart_params” javascript variable from WooCommerce, which is a required information by Molongui Deals to update cart/order contents.
That variable not being defined might be caused by a cache/optimization plugin or because somehow you prevent ‘add-to-cart.js’ file or any other WooCommerce related script to be loaded. If you are using a cache/optimization plugin, try cleaning the cache. That might be it.
