If you need to setup payment with Affirm/ AfterPay/ Klarna, please do not click the PayPal checkout option. Instead, click on "checkout". Once you fill in your billing and shipping information, click on "continue" and it will take you to the payment section (step 3) where you'll see all the different payment options. Here you can select the specific merchant such as Affirm/ AfterPay/ Klarna or pay with a credit card. Please use the "message" option if you have any difficulties. Thank you!