"Required parameter missing or invalid: items"

Hi, I’ve started getting this error “Required parameter missing or invalid: items” when adding to cart

My theme is Dawn and my customers are continuously facing this issue! Please help anyone.

Hi @binteamin2021 ,

This looks like your missing some input code or javascript code. Did you do some custom codes?

I only did this change to the code that too a month ago

https://community.shopify.com/topic/1554521