Fatal error: Uncaught Error: Class 'Symfony\Component\Console\Event\ConsoleEvent' not found in /home/mattiapa/cloud2.mprnl.fr/owncloud/lib/composer/symfony/console/Event/ConsoleCommandEvent.php:22 Stack trace: #0 {main} thrown in /home/mattiapa/cloud2.mprnl.fr/owncloud/lib/composer/symfony/console/Event/ConsoleCommandEvent.php on line 22