Knowledge base
WooCommerce troubleshooting knowledge base
Technical guides to real WooCommerce problems: what the symptoms mean, what usually causes them, how to diagnose them step by step, and when to involve an engineer.
Problem areas
Start from the symptom
Each area explains how its problems are diagnosed and links to the specific guides.
Checkout not completing
Checkout that keeps loading, Place Order that does nothing, errors on submit, guest checkout broken.
Gateway and callback failures
Charged without an order, orders stuck in pending, failed payments, webhooks and 3D Secure.
Missing or incorrect orders
Missing orders, wrong totals, statuses that never change, order data inconsistencies.
PHP, JavaScript and database errors
Critical errors, white screens, JavaScript and AJAX errors, plugin and theme conflicts, database errors.
Slow checkout and admin
Slow checkout and admin, 502/504 errors, slow queries, Action Scheduler and WP-Cron backlogs.
Order storage compatibility
What HPOS changes, why custom code breaks, and how to migrate order storage safely.
REST API, webhooks and external systems
REST API authentication, webhook deliveries, ERP/CRM syncs, timeouts and duplicated data.
When it cannot wait
How to judge whether a WooCommerce problem is an emergency, and the first safe steps.
Latest technical guides
- WooCommerce / Checkout WooCommerce Checkout Not Working: How to Diagnose the Root Cause First determine whether the failure happens before the checkout request, during it, or after the gateway response. The Network panel and PHP logs usually reveal which layer fails.
- WooCommerce / Payments WooCommerce Payment Failed but Customer Was Charged When the gateway captures the payment but the order stays pending or failed, look at the callback and webhook handoff before touching the order.
- WooCommerce / Orders WooCommerce Orders Missing or Incorrect Before assuming an order is lost, check every status, drafts and the payment provider. Incorrect totals usually come from tax settings, fees, coupons or recalculation.
- WooCommerce / HPOS WooCommerce HPOS: Common Problems With Custom Code Direct wp_posts queries, get_post_meta() on orders and other code that silently breaks once orders live in their own tables.
- WooCommerce / Performance WooCommerce Slow Checkout: What to Check Separate PHP execution time, database queries and external API calls before changing caching or hosting.
- WooCommerce / Errors WooCommerce Fatal Error: A Practical Troubleshooting Guide Read the fatal error properly — file, line, stack trace — and connect it to the change that triggered it.
- WooCommerce / Errors WooCommerce Plugin Conflict: How to Find the Cause Start from the evidence — the error, the timing, the request — and isolate on staging by halves, not one plugin at a time on production.
- WooCommerce / Integrations WooCommerce Webhook Troubleshooting Delivery logs, response codes, signatures, and why WooCommerce disables a webhook after repeated failed deliveries.
How these guides are written
Every guide follows the same structure: a short answer first, then the symptoms, the most common causes, a step-by-step diagnosis, the logs and checks that matter, possible fixes, the fixes to avoid, and when the problem needs an engineer. They assume a technically competent reader — a store owner who is comfortable with the WordPress admin, or a developer.
$ describe the problem
Have a WooCommerce problem?Request a diagnosis.
Tell us what is failing, what changed recently and the business impact. We review every request and recommend the appropriate next step.
Never send passwords, API keys or card data through the form.