Fatal error: Uncaught Error: Class 'Symfony\Component\Console\Descriptor\Descriptor' not found in /home/mattiapa/cloud2.mprnl.fr/owncloud/lib/composer/symfony/console/Descriptor/XmlDescriptor.php:27 Stack trace: #0 {main} thrown in /home/mattiapa/cloud2.mprnl.fr/owncloud/lib/composer/symfony/console/Descriptor/XmlDescriptor.php on line 27