Error codes

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 You may come across references to Klarna, outdated screenshots, or broken links.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.

Common error codes from Klarna:

• 400 – Bad Value: purchase_currency
  Your account at Kustom doesn’t seem to be configured for the currency used in your store. What currency did you select when you signed up with Kustom? If you need support, you should contact Kustom via their Knowledge Base or support@kustom.co.
• 400 – Bad value: push
  Your domain does not have a valid SSL Certificate. As of summer 2023 Kustom demands HTTPS.
• 401 – Unauthorized
  If you receive this error message it usually means that you are using your credentials for the wrong plugin. It could also mean that the username and/or password is incorrect, try copying & pasting instead of typing in directly and double check for whitespace. If you need support, you should contact Kustom via their Knowledge Base or support@kustom.co.
• 403 – Forbidden
  Make sure you are using an up to date version of KCO (minimum 2.12.3 and above). Earlier versions are blocked for usage from Kustom’s side.
• 403 – Invalid_Operations
  (403 error code means the Kustom credentials authenticate successfully (so Kustom API credentials/username & password are correct) but you haven’t selected the Kustom products to enable these credentials to work yet. You should be able to select products in the Kustom Merchant Portal, but if you need assistance, you should contact Kustom via their Knowledge Base or support@kustom.co.
• 403 – Merchant_Inactive
  This means that your Kustom credentials are NOT activated. If you need support, you should contact Kustom via their Knowledge Base or support@kustom.co.
• 403 – PAYMENT_METHOD_FAILED
  Check the reason. This usually happens when Kustom rejects a purchase.
• 404 – Not found
  Where credentials were changed during the order. Please make sure to start a new browser session after changing credentials. If you need support, you should contact Kustom via their Knowledge Base or support@kustom.co.
• 405 – Method not allowed
  Merchants are encountering issues when their Kustom credentials are a valid username & password, but aren’t correctly configured for the market they are using them for. If you need support, you should contact Kustom via their Knowledge Base or support@kustom.co.
• 500 – Internal Server Error
  A 5xx error usually indicates a server-side issue. It could be caused by server configuration problems or a fatal error in plugin or theme code. Contact your hosting provider or developer to investigate.
  If you suspect a plugin-related error, contact us at Krokedil and send us the following information:
  
  • WooCommerce logs
  • The fatal error log from the day the issue occurred
  You can find information on how to obtain the logs, as well as other support related information, in the How to prepare a support ticket article.

Common error codes from our plugin:

• Kustom Checkout error (Failed to load Kustom Checkout template file.)
  This means that there is another plugin or theme that overrides and makes our template file not to load correctly in the checkout.
  This error message can also be shown when your WooCommerce Checkout page is missing the [woocommerce_checkout] shortcode.