If you are having trouble paying with Klarna, it could be due to the following reasons:
Klarna may have rejected your application to pay on account. We'd recommend choosing another type of payment or placing an order for a smaller amount.
Klarna may not have been able to check your details using the billing address that you've provided. You'll need to make sure that your billing address is the same address that your bank/credit cards are registered to.
You may have outstanding payments on previous Klarna statements. If you've recently paid off outstanding statements, we recommend waiting 24 hours before trying to pay through Klarna again.
You may have missed a required field at the checkout, such as filling in your Date of Birth.
If you haven't used Klarna before and you're shipping to a different address to your billing address, the payment may be declined.