Why does adding products to cart show an error message?

Customers are seeing an error when they add to cart for any product on the site.

There is an error when updating your cart.

How do i fix this?

Heres a product URL.

https://acharyanet-india.myshopify.com/products/registration-for-all-india-radio-audition-prep-course-part-1

Hi, @acharyanet !

Can I ask what kind of error your customers are seeing? I can add products to your cart page, and move on to the checkout page with ease, the only thing I saw that was a little odd was that a piece of coding showed beside the currency when I updated the quality of a product in the cart.

This is my cart first, with 2 products:

After that I tried to update my cart, I added an extra quantity and I could see beside the subtotal:

Can I ask if you have made any coding changes to your theme? Also, what is the name of the theme you are currently using?