As Klarna Checkout transitions to Kustom Checkout, please note that parts of this documentation are still being updated. You may come across references to Klarna, outdated screenshots, or broken links.

We’re working continuously to revise all content, and we appreciate your patience during this process.

Here you will find documentation on how to troubleshoot Kustom Checkout for WooCommerce – help and FAQ.

• Embedded checkouts in WooCommerce
• Error codes
• Compatible plugins and themes
• Known compatibility issues
• Files to exclude from optimization
• Shipping Methods in iframe
• FAQ
• Optimizing your checkout when using an Iframe-based checkout
• Callbacks
• Resolve the endpoint warning in Kustom
• Troubleshooting order emails
• Troubleshooting the checkout flow
• Troubleshooting the Pay for order/Hosted Payment Page flow
• Troubleshooting WooCommerce Subscriptions and KCO
• Kustom Developer logs
• Pending payment orders and held stock