booking now button at "booking the tour" form is not working

https://www.juatravel.com/tours/bandung-jua-2019/

hye, after i add the shortcode that you give me before. the booking now button is not function.
before this, i ask how to remove first name, last name and phone number right?
only left the date booking.
you can try enter to my website. its not function. huhu. please help as soon as possible. thanks