TypeError: $.cookie is not a function

Hi, I got the following error in Mozilla firebug on website https://www.epicurieuse.be/ The widget is not displayed correctly 🙁

TypeError: $.cookie is not a function
https://www.epicurieuse.be/wp-content/plugins/woocommerce-email-cart/assets/js/email-cart-frontend.js
Line 9

Any idea ?
Thank you