Help! After adding products to the cart and attempting to continue to checkout on our website https://summitsport.com.au, we are directed to a page that says 'cart is empty' and cannot complete the purchase. Three of us have tested it and it's not working for any of us. This is occurring when not logged in. It seems to work ok when logged in (in which case a wholesale discount is applied). Any suggestions regarding why this is happening would be greatly appreciated!