Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Envelope" not found in /var/www/html/casavio-qa.das24.it/releases/16/vendor/symfony/mailer/DelayedEnvelope.php:24 Stack trace: #0 {main} thrown in /var/www/html/casavio-qa.das24.it/releases/16/vendor/symfony/mailer/DelayedEnvelope.php on line 24