Fatal error: Uncaught Error: Class "Symfony\Component\Notifier\Channel\AbstractChannel" not found in /var/www/html/immobilier-des-particuliers.fr/vendor/symfony/notifier/Channel/ChatChannel.php:22 Stack trace: #0 {main} thrown in /var/www/html/immobilier-des-particuliers.fr/vendor/symfony/notifier/Channel/ChatChannel.php on line 22