Can’t add a product without a variable now

Hello! I received this message below so i clicked not to see it and I now I cannot add to cart in woocommerce.

Please select some product options before adding this product to your cart.

Have you any idea where to fix the add to cart without a product having a variable or a woocommerce plugin for it? For example:
https://thejewelrybutler.com/product/korean-wedding-bride-female-diamond-necklace-earrings-set-water-hot-money-supply-accessories-wholesale-trade/

Thank you!
Kevin

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