Fatal error: Uncaught Error: Class 'Symfony\Component\Console\Helper\Helper' not found in /home/devypfrfhn/avancement.devyp.fr/vendor-old/symfony/console/Helper/DebugFormatterHelper.php:21 Stack trace: #0 {main} thrown in /home/devypfrfhn/avancement.devyp.fr/vendor-old/symfony/console/Helper/DebugFormatterHelper.php on line 21