Fatal error: Uncaught Error: Class 'Symfony\Component\Mailer\Exception\InvalidArgumentException' not found in /home/soh-works/www/Stepup_test/vendor/symfony/mailer/Exception/IncompleteDsnException.php:17 Stack trace: #0 {main} thrown in /home/soh-works/www/Stepup_test/vendor/symfony/mailer/Exception/IncompleteDsnException.php on line 17