Fatal error: Uncaught Error: Interface "Symfony\Component\Mailer\Transport\TransportInterface" not found in D:\Apache24\www\qilu_sap\back-end\vendor\symfony\mailer\Transport\AbstractTransport.php:31 Stack trace: #0 {main} thrown in D:\Apache24\www\qilu_sap\back-end\vendor\symfony\mailer\Transport\AbstractTransport.php on line 31