Why Is My WooCommerce Checkout Page a Blank White Screen?

Why a WooCommerce Checkout Goes Blank

PHP fatal errors normally halt script execution entirely, and with error display turned off (the correct, secure setting for a live production site), the visitor just sees a blank page instead of an error message. Checkout is a common place for this to surface because it runs a large amount of code across WooCommerce core, the active theme, and every active plugin simultaneously — any one of them throwing a fatal error stops the whole page from rendering.

Common Causes of a White Screen at Checkout

• A plugin update introducing an incompatibility with the current WooCommerce or PHP version, often only surfacing on checkout specifically since that's where the conflicting code path runs.
• A theme's checkout template override written against an older WooCommerce template structure, breaking after a WooCommerce update changes the expected template format.
• A PHP version upgrade (by the host, sometimes without notice) exposing a deprecated function call in an outdated plugin that previously worked fine.
• Memory limit exhaustion on a heavier checkout page, which can also present as a blank screen rather than a clear "out of memory" message depending on server configuration.

How to Diagnose and Fix It

1. Enable WP_DEBUG_LOG in wp-config.php and reproduce the blank page, then check wp-content/debug.log for the specific fatal error and its file/line.
2. Check the hosting control panel's PHP error log as an alternative if WordPress debug logging isn't accessible directly.
3. Deactivate plugins one at a time on a staging copy if the log doesn't point clearly at a specific cause, following the same isolation approach used for any plugin conflict.
4. Check recent changes (plugin updates, PHP version changes) against when the blank screen started appearing, since timing is often the fastest clue.

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