Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Transport\AbstractTransport" not found in C:\xampp\htdocs\systemcolas\vendor\symfony\mailer\Transport\Smtp\SmtpTransport.php:32 Stack trace: #0 {main} thrown in C:\xampp\htdocs\systemcolas\vendor\symfony\mailer\Transport\Smtp\SmtpTransport.php on line 32