Fatal error: Uncaught Error: Class 'Symfony\Component\Mailer\Envelope' not found in /home/soh-works/www/Stepup_test/vendor/symfony/mailer/DelayedEnvelope.php:24 Stack trace: #0 {main} thrown in /home/soh-works/www/Stepup_test/vendor/symfony/mailer/DelayedEnvelope.php on line 24