Fatal error: Uncaught Error: Interface 'Symfony\Component\Mailer\Transport\TransportInterface' not found in C:\Apache24\htdocs\InvoiceTracking\vendor\symfony\mailer\Transport\AbstractTransport.php:28 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\InvoiceTracking\vendor\symfony\mailer\Transport\AbstractTransport.php on line 28