WooCommerce: "Please choose Product Options" for the product which have variants

I am displaying a product on static content page (Shop Page Not Product Page) using shortcode [product_page id="2809"]. Product is displaying now but the problem is that the Add to cart button is not working.

The Add to Cart button works very well if the product is having no variant but when I added some variants, the Add to Cart button stopped working and start displaying an error message "Please Choose Product Options".

Please have a look at this screenshot:

Thanks

via Chebli Mohamed