Add to Cart no reaction shown

Hi there,

I have a problem with my shop www.taneraskin.com :

When you add something to the cart, it shows no reaction. It should increase the number of items shown as a little number on the shopping bag symbol and it should show a box on the right side (like a cart pop up), but it’s not doing anything. The item is added to the cart, and if you klick on the cart you can see it, but I need a reaction to when a customer clicks on “Add to cart” (“In den Warenkorb”).

Do you have an idea how to do it? Using Dawn theme.

Example product: https://taneraskin.com/products/loofah-schwamm

Best,

Isabelle