Update Cart error Woocommerce

Hi,

I’m working on my site in localhost with Xampp, and when I add a product to cart, if a I want to change the item quantity and update cart, I receive this error after clicking update cart button:

cart.min.js?ver=7.9.0:1 Uncaught TypeError: t.addClass(…).block is not a function
at a (cart.min.js?ver=7.9.0:1:277)
at Object.quantity_update (cart.min.js?ver=7.9.0:1:5209)
at Object.cart_submit (cart.min.js?ver=7.9.0:1:4045)
at HTMLDocument.dispatch (jquery-3.6.0.min.js:2:43064)
at v.handle (jquery-3.6.0.min.js:2:41048)
a @ cart.min.js?ver=7.9.0:1
quantity_update @ cart.min.js?ver=7.9.0:1
cart_submit @ cart.min.js?ver=7.9.0:1
dispatch @ jquery-3.6.0.min.js:2
v.handle @ jquery-3.6.0.min.js:2

If I simply change from my highend child theme to a default wordpress theme (twenty twenty-three), I can update the cart correctly adn there’s no error. Could you please give me some help with this? I’ve been working with Highent Theme and now I can’t start again with a default wordpress theme, I want to use Highend.

Woocommerce version is 7.9.0 (I have the error with previous version too).