If you have any trouble placing an order with Klarna, it could be due to one of 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. You may have outstanding payments on previous Klarna invoices.
You may have missed a required field at the checkout, such as filling in your Date of Birth.
You are using a pre-paid debit card.