Klarna has been able to recover and restore their systems. This means that all of their services are fully operational again, including the Klarna Checkout.

Klarna is still experiencing disturbances, however, it seems like the issue is getting resolved.
We will continue to monitor this issue until further confirmation.

Klarna is continuing to investigate this issue:
"Due to a technical error, customers may be experiencing difficulties in making purchases with Klarna or using our app. We are addressing this as a matter of priority and will let you know when it is resolved. We are sorry for any inconvenience this is causing."

All shops are currently experiencing troubles while loading the Klarna widget in their checkout.

From Klarna:
"The incident seems to affect Klarna Checkout, Klarna Payments, Instant Shopping, One-time card and Klarna Card. Also, the Klarna App is in degraded status in the EU currently. We have engineering teams investigating and working on a fix with a high priority."