Fatal error: Uncaught Error: Class 'Symfony\Component\Console\Descriptor\Descriptor' not found in /mnt/volume_lon1_01/backend/admin/vendor/symfony/console/Descriptor/JsonDescriptor.php:27 Stack trace: #0 {main} thrown in /mnt/volume_lon1_01/backend/admin/vendor/symfony/console/Descriptor/JsonDescriptor.php on line 27