Weird problem with woocommerce

Hi,

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 http://139.59.129.50/socialstore/ we cannot add the test product to our shopping cart, but from the product page, http://139.59.129.50/socialstore/test-product/ we can.

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