Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Exception\LogicException" not found in D:\Apache24\www\qilu\back-end\vendor\symfony\mailer\Exception\UnsupportedSchemeException.php:20 Stack trace: #0 {main} thrown in D:\Apache24\www\qilu\back-end\vendor\symfony\mailer\Exception\UnsupportedSchemeException.php on line 20