PayPal checkout can fail in WooCommerce due to misconfiguration, API credential issues, caching, or conflicts. Confirm the gateway is enabled and your PayPal Business account is connected, with correct country/currency. Reconnect the plugin and let it recreate webhooks; missing webhooks often break capture and order updates. Check SSL is valid and your site URL matches WordPress Address. Disable caching/minification for checkout pages and clear server/CDN cache. Test with a default theme and deactivate other payment/checkout plugins. Review WooCommerce logs for PayPal errors, and ensure your hosting firewall isn’t blocking PayPal requests. Update WooCommerce and the PayPal plugin, then retest again.
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