Fatal error: Uncaught Error: Interface 'TopConcepts\Klarna\Core\PaymentHandlerInterface' not found in /www/shop/vendor/fatchip-gmbh/oxid-klarna-6/Core/KlarnaPayments/PaymentHandler.php:11 Stack trace: #0 {main} thrown in /www/shop/vendor/fatchip-gmbh/oxid-klarna-6/Core/KlarnaPayments/PaymentHandler.php on line 11