Performance & troubleshooting
Checkout failures should be diagnosed from the shopper action through the network request to order creation and payment response. “Checkout not working” can describe validation, JavaScript, gateway, session, tax, shipping or integration failures.
Direct answer
To troubleshoot WooCommerce checkout, reproduce the failure with the same cart, country, payment and shipping conditions; check browser/network errors and WooCommerce logs; verify block/extension compatibility; then retest order creation and payment status after the fix.
Current facts
Answer scope
Record products, quantities, country, shipping method, coupon, logged-in state and payment method. Many failures occur only for one combination.
A generic empty-cart test can miss the condition that customers actually encounter.
A field can fail in JavaScript before the request is sent, or the server/gateway can reject the order after submission. Browser console/network evidence and WooCommerce logs help identify the boundary.
Current Checkout utilities provide explicit validation interfaces for block checkout.
WooCommerce’s block-based Cart and Checkout have documented extensibility interfaces and do not support every legacy hook in the same way.
An old snippet or extension may appear fine visually but fail when the block checkout processes data.
Checkout and session behavior should not be served from a generic page cache. CDN, cache and optimization rules that alter scripts or cookies can cause intermittent failures.
Temporarily bypass the optimization layer to determine whether the application works without it.
A successful thank-you page is not the only acceptance check. Confirm the order exists once, has the correct totals/status, and the gateway/webhook updates arrive as expected.
If fulfillment integrations depend on the order, confirm that downstream handoff too.
Questions
Possible causes include field validation, payment gateway errors, shipping/tax configuration, JavaScript failures, caching, plugin conflicts and incompatible legacy checkout customizations.
Compare checkout with another known-good payment method if appropriate, then inspect WooCommerce/gateway logs and the network/server response for the failing attempt.
Yes if checkout/session pages or relevant cookies are cached or scripts are modified unsafely. Test with the optimization layer bypassed and restore only compatible rules.
Evidence
First-party platform documentation and clearly labelled public market benchmarks used for factual claims on this page. A source link does not imply endorsement.
Current extension model for block-based cart and checkout, including JavaScript, PHP and Store API integration boundaries.
Current checkout validation interfaces and error-handling behavior, last updated May 2026.
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