"Open on add to cart" in Quick Mini Cart App is not working.

[anreistica]

Here is the problem. In the product pages where you add a product there is function for the app Quick Mini Cart. The function is called "Open on add to cart". The website is https://www.forfit.gr/, I am trying to use the function from the app and it's still not working. There is button for switch on and off in the app menu. Please tell me is there a way to turn this function on?