Woocommerce cart / checkout pages crashed.

We have a problem with our website, When we deactivate the Fancy Product Designer plugin, both of our card page/checkout pages works perfectly fine. But the moment I Activate the plugin both the cart and checkout page crashed. 

   This is after deactivating, Fancy Product Designer.

  This is the result after activating the plugin.


Your help will be much appriciated.

Thank You!