The “Add to Cart” button does not work in the 1C Bitrix cart itself?

Question

PHP

Good afternoon!
There is a site on 1c bitrix, on it the cart page /personal/cart/
on this page a product appears
when you click on the "Add to cart" button There is a product in the cart itself, and when I click on the "Add to cart" button, nothing happens , full 0,
From all other pages the button works fine
How can I solve this problem?

Answer 1

There is a product in the cart itself, and when I click on the "Add to cart" button, nothing happens, full 0,

nothing at all? JS errors in the console?