Klarna Checkout – Error codes

Common error codes from Klarna:

  • 400 - Bad Value: purchase_currency
    Your account at Klarna doesn't seem to be configured for the currency used in your store. What currency did you select when you signed up with Klarna? If you need support, you should email moa.support@klarna.com
  • 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 email moa.support@klarna.com
  • 403 - Invalid_Operations
    (1). 403 error code means the Klarna credentials authenticate successfully (so Klarna API credentials/username & password are correct) but merchant hasn't selected the Klarna products to enable these credentials to work yet. You should be able to select products in the Klarna Merchant Portal, but if you need assistance, you can email moa.support@klarna.com
    (2). 403 error code could also mean the merchant is using the wrong plugin (KP) when they have credentials configured for KCO.
  • 404 - Not found

    Where credentials were changed during the order. Please make sure to start a new browser session after changing credentials.
  • 405 - Method not allowed
    Merchants are encountering issues when their Klarna credentials are a valid username & password, but aren't correctly configured for the market they are using them for. Check which product (KP or KCO) you signed up with at Klarna or contact them on merchant@klarna.com

Common error codes from our plugin:

  • Klarna Checkout error (Failed to load Klarna 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.
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