Fatal error: Uncaught Error: Interface "App\Infrastructure\Smpp\Inbound\Processing\InboundEnvelopeProcessingOutcome" not found in C:\xampp\htdocs\smsgateway\app\Infrastructure\Smpp\Inbound\Processing\InboundEnvelopeHandled.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\smsgateway\app\Infrastructure\Smpp\Inbound\Processing\InboundEnvelopeHandled.php on line 9