WordPress and WooCommerce repair: protect the live store while finding the conflict

Start with what the visitor cannot do

A critical error or HTTP 500 concerns the site's execution. A store that loads but cannot complete checkout has a different failure and acceptance test. Write the exact visitor sequence, affected product or page, first observed time and preceding update before changing plugins.

• Critical error: inspect existing application and host logs for a first relevant fatal error.
• Checkout failure: record whether failure occurs at cart, address, shipping, payment or order confirmation.
• Keep customer details and payment information out of screenshots and enquiry logs.

A staging copy is not automatically harmless

WooCommerce recommends a staging copy and backups for conflict testing. A clone can still contain live payment, email or integration settings. Agree an isolated test route, synthetic orders and disabled external effects before testing; merely changing the hostname does not make a copy safe.

• Keep a known restore point and name who can restore it.
• Use a test payment configuration approved by the account holder.
• Do not copy real customer records into an agent's workspace.

Find a cause, not a lucky combination

Compare the theme and plugin combinations systematically and repeat the same failing sequence. Host-managed must-use plugins, drop-ins and caches can survive ordinary deactivation. Record each combination and result; if re-enabling a component restores the failure, that is more useful than leaving everything disabled.

• Do not remove essential checkout capabilities simply to obtain a passing demonstration.
• After a fix, check an unaffected path as well as the original regression.

Choose an accountable repair

Request the named broken flow with a redacted error and change history. The scope should state included components, exclusions, test-order evidence, reversal and who approves a live change. This is a newly offered service catalogue, not evidence of previous customer deliveries or guaranteed conversion improvement.