Error Message

I am trying to use a bulk pricing plugin and not sure if this error is theme related. It does not seem to be plugin related.

When a customer selects, say, 10 items adn I go to the “cart” page the discount is not there automatically. For some strange reason I have to click on “apply coupon” even though I have no coupons assigned anywhere to any items.

My error log give me this message:

The “add_to_cart_fragments” hook uses out of date data structures and function is deprecated since version 3.1.1. Replace with woocommerce_add_to_cart_fragments.

So is there some code I can add anywhere to circumvent this issue?

Thank you!