Conflict with Advanced Custom Fields Pro

Having issues whenever ACF Is activated. If a customer tries to purchase this document for download, clicking on the Buy Now button redirects you to checkout-2 which says Your Cart is Empty. If ACF is deactivated, you can check out.

I already tried deactivating all the other plugins except for ACF and EDD and switching to Twenty Twenty Three, but no luck.

The page I need help with: [log in to see the link]