Fatal error: Uncaught Error: Class "Symfony\Component\Console\Helper\Helper" not found in /users/ms-it/www/oc/lib/composer/symfony/console/Helper/InputAwareHelper.php:22 Stack trace: #0 {main} thrown in /users/ms-it/www/oc/lib/composer/symfony/console/Helper/InputAwareHelper.php on line 22