Klarna is currently experiencing app degradation issues as of September 30, 2025, which is affecting hundreds of users and causing problems with the service functioning properly. This could be a reason why Klarna is "not working" for some users right now.

Other common reasons why Klarna might not work include:

• Using an unsupported region or country where Klarna is not available.
• Payment being declined due to mismatched billing and shipping addresses, insufficient funds, or the purchase amount being too high.
• Technical issues like not using the latest app version, browser cookies needing to be cleared, or network restrictions.

Additionally, Klarna has been facing business challenges such as losses and credit losses in 2025, but the company remains operational. There was also a deprecation of some payment methods (like Sofort) by Klarna in 2024, which could affect merchant acceptance but is unrelated to current app functionality.

In summary, Klarna might not be working at this moment mainly due to a known app degradation incident on September 30, 2025, alongside typical issues like region restrictions, payment declines, or app/browser problems. Checking Klarna's status page, updating the app, ensuring correct account information, and verifying payment details are recommended steps to troubleshoot. If problems persist, contacting Klarna customer support would be advisable.