Fatal error: Uncaught Error: Class 'Symfony\Component\Process\Pipes\AbstractPipes' not found in /home/mattiapa/cloud2.mprnl.fr/owncloud/lib/composer/symfony/process/Pipes/UnixPipes.php:23 Stack trace: #0 {main} thrown in /home/mattiapa/cloud2.mprnl.fr/owncloud/lib/composer/symfony/process/Pipes/UnixPipes.php on line 23