Form validation notification missing

Hi,

I added some custom product fields form in my single product page. But whenever the user missed out to input a required field and go for “add to cart” button, no validation notification is coming up to mention the same. I tried the same page with different theme, then the notification is working. But if i use the woostify theme, no notification.

I am using free version of Woostify.

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