Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Exception\InvalidArgumentException" not found in D:\Apache24\www\qilu_sap\back-end\vendor\symfony\mailer\Exception\IncompleteDsnException.php:17 Stack trace: #0 {main} thrown in D:\Apache24\www\qilu_sap\back-end\vendor\symfony\mailer\Exception\IncompleteDsnException.php on line 17