Fatal error: Uncaught Error: Class "Symfony\Component\Console\Command\Command" not found in /home/airtimer/public_html/vendor/magento/module-developer/Console/Command/DiInfoCommand.php:17 Stack trace: #0 {main} thrown in /home/airtimer/public_html/vendor/magento/module-developer/Console/Command/DiInfoCommand.php on line 17