When user goes to purchase hosting is redirected to purchase page after first step

When I go to purchase a product, or login through wordpress to whmcs on the front end, I get kicked back to either the login page (when logging in) or the purcahse page (when trying to purchase). I can access the cart seperately, but can never add something to the cart.

Here is my hosting page: http://www.webhivehq.com/hosting/?whmcsportal%5Bpage%5D=whmcs%3A%2F%2Fmanager.webhivehq.com%2Fwhmcs%2Fcart.php

If you try adding a product and going through the process of selecting a domain… the next step after that should be step two, but it kicks you back to the start.

I appreciate any help.

Thank you in advance.