Shortcode for add to cart

Hi, What a great plugin!! With shortcode [event-add-cart-section event=EventID]
I try to ingrate an add to cart button below a page. That works, but there is no link to push in cart. What am I doing wrong here? I see no console errors. Check the link to the page, on the buttom you see it.

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