Woocommerce checkout page endless loading circle

Hi guys,
Whenever someone goes to the checkout page the shipping and payment options show a loading circle forever and there is no way to get past that point. My URL is https://eliquid.kiwi

In chrome developer console it is showing an Ajax error on the checkout page, I have spent hours trying to get it working and am losing money every hour, is there anything you could recommend?

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