Fatal error: Uncaught Error: Interface "Klarna\Rest\Transport\UserAgentInterface" not found in C:\AppServ\www\greenhess-storage\vendor\klarna\kco_rest\src\Klarna\Rest\Transport\UserAgent.php:27 Stack trace: #0 {main} thrown in C:\AppServ\www\greenhess-storage\vendor\klarna\kco_rest\src\Klarna\Rest\Transport\UserAgent.php on line 27