shopping cart v.2.0.3 by Prestashop NOT WORKING

[bennik]

Hi guys and girls,  

 

Can you please help me with this issue. 
My add to cart suddently stopped working.
When we press add to cart, there is no response. The cart remains empty.
This happens from google chrome , Firefox , internet and also from any mobile .
I did not have this issue before .
I have not installed any new module. I have uninstalled and reinstalled the shopping cart module, and the problem still exists.
The page gets updated, but nothing get added to the shopping cart, so the cart stays empty.

Steps to reproduce the behavior:

Go to https://benush.es/en/all_products/35-milk-chocolate-tablet-14
Click on Add to Cart
See that Cart icon stays empty

Additionnal information
I use prestashop 1.7.6.2
PHP version: 7.2.34

Thanks in advanced