Console error when changing variants in quick add modal (Dawn)

[Exonerate]

I'm getting "Uncaught ReferenceError: onChangeVariantCallback is not defined" when selecting different variants in the quick add modal. This is blocking me from using a pre-order app to change the buy button.

I have not made any code changes to product-info.js or anything related to quick add.

Any help with this is greatly appreciated!

Link: https://www.glowingjewels.com/collections/all-products