If your checkout stops working, every minute costs you direct revenue. Customers add items to cart, proceed to checkout, and hit an error — “Unable to process payment,” a white screen, an infinite loading spinner, or a redirect loop that never completes. The cart abandonment rate goes from expected to 100%, and you’re losing orders you’ll never see in abandoned cart recovery emails because the customers never made it past the payment step.

Checkout failures are usually caused by a specific breaking change. A Shopify Payments configuration issue. A third-party payment gateway misconfigured or disconnected. Custom checkout.liquid code that’s incompatible with a recent Shopify platform update. A script injection from an app that’s breaking the payment flow. Shipping calculation logic that errors out before the payment form can render. We diagnose the exact cause and restore functional checkout — not just turn off everything until something works.