Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Envelope" not found in E:\phpProject\TEST\fr_epr\fr_epr_reg\vendor\symfony\mailer\DelayedEnvelope.php:24 Stack trace: #0 {main} thrown in E:\phpProject\TEST\fr_epr\fr_epr_reg\vendor\symfony\mailer\DelayedEnvelope.php on line 24