Fatal error: Uncaught Error: Class "Symfony\Component\Process\Exception\ProcessFailedException" not found in /media/jean/learning/huagai/drupal/vendor/symfony/process/Exception/ProcessStartFailedException.php:19 Stack trace: #0 {main} thrown in /media/jean/learning/huagai/drupal/vendor/symfony/process/Exception/ProcessStartFailedException.php on line 19