Fatal error: Uncaught Error: Interface "Symfony\Component\Notifier\ChatterInterface" not found in /home/pataplou/www/patrick/pataplouf/vendor/symfony/notifier/Chatter.php:24 Stack trace: #0 {main} thrown in /home/pataplou/www/patrick/pataplouf/vendor/symfony/notifier/Chatter.php on line 24