Product Checkout Page is now showing in Mobile devices

Hi,
My customers are not able to see product checkout page from their mobile devices.
When they tried to purchase any product from mobile device, the checkout page is not displaying on mobile devices. They only can able to add the product on cart, the further process is not working. I herewith attached the screenshot.
Kindly give me the solution of this on urgent basis. Because our maximum customers are using mobile device to purchase products. Despite of this problem, we are facing such big lose.