Fatal error: Uncaught Error: Class 'Symfony\Component\Mailer\Envelope' not found in /home/users/00/3c/21/home/www/vendor/symfony/mailer/DelayedEnvelope.php:24 Stack trace: #0 {main} thrown in /home/users/00/3c/21/home/www/vendor/symfony/mailer/DelayedEnvelope.php on line 24