Fatal error: Uncaught Error: Class 'Concrete\Core\Console\Command' not found in /home/gmcguire/public_html/concrete5/concrete/src/Console/Command/InstallPackageCommand.php:21 Stack trace: #0 {main} thrown in /home/gmcguire/public_html/concrete5/concrete/src/Console/Command/InstallPackageCommand.php on line 21