Fatal error: Uncaught Error: Interface "Symfony\Component\Mailer\Exception\ExceptionInterface" not found in C:\xampp\htdocs\londoncityroom\vendor\symfony\mailer\Exception\InvalidArgumentException.php:17 Stack trace: #0 {main} thrown in C:\xampp\htdocs\londoncityroom\vendor\symfony\mailer\Exception\InvalidArgumentException.php on line 17