The app requires constant updates for it to work properly and assumes you know how to troubleshoot everything correctly. The app updates two to three times a week and roughly requires 20-40mb of data per update. Assuming you've updated everything, you need to make sure your cart is clear of all items AND offers before attempting to place an online order. If anything was left before the update, it will guarantee a failure in your order after the update. Technology at its worst here...