Fatal error: Uncaught Error: Class 'Composer\Command\BaseCommand' not found in /home/esecureh/public_html/magdemo/vendor/magento/magento-composer-installer/src/MagentoHackathon/Composer/Magento/Command/DeployCommand.php:21 Stack trace: #0 {main} thrown in /home/esecureh/public_html/magdemo/vendor/magento/magento-composer-installer/src/MagentoHackathon/Composer/Magento/Command/DeployCommand.php on line 21