cart update button and save coupon button doesn't work

as I saied, I'm using your version on VM in storefront template.
ion the cart page there are the Update quantity for product button and a little lower then that, the save button for the coupon.
none of them work...

they just do nothing...

I add a link to the website: https://www.donttellmama-studio.com

please help me.

quick update: I found out that ALL submit buttons in the default_pricelist.php file don't respond.

guys, please. I'm stuck.
I can't get the submit buttons to work in the cart page