Weird problem with woocommerce


We are currently building a community site, where users are able to sell their stuff over our marketplace. We are using Woocommerce with Dokan plugin to enable multi vendor marketplace functionality, but have run into a strange problem.

On our test site,
from here we cannot add the test product to our shopping cart, but from the product page, we can.

Actually, we cannot add the product other than its own page. Help will be much appreciated on this one. Thanks a lot.