"Offers", "reviews" or "aggregateValue" must be specified

I just went through my site on a wordpress WooCommerce platform. https://swordsofhonor.com.

Today, Google sends me this message:
"Offers", "reviews" or "aggregateValue" must be specified

on this page – https://swordsofhonor.com/product-category/die-hobby-stone/
This is a category & # 039; & # 039; page with 2 items on it. I have no idea what the error message means or how to fix it.