Fatal error: Uncaught Error: Class "Symfony\Component\Notifier\FlashMessage\AbstractFlashMessageImportanceMapper" not found in /home/pataplou/www/patrick/pataplouf/vendor/symfony/notifier/FlashMessage/DefaultFlashMessageImportanceMapper.php:19 Stack trace: #0 {main} thrown in /home/pataplou/www/patrick/pataplouf/vendor/symfony/notifier/FlashMessage/DefaultFlashMessageImportanceMapper.php on line 19