Fatal error: Uncaught Error: Class 'SilverStripe\Core\Manifest\ModuleLoader' not found in /var/www/html/vendor/silverstripe/cms/_config.php:15 Stack trace: #0 /var/www/html/vendor/silverstripe/cms/_config.php(25): {closure}() #1 {main} thrown in /var/www/html/vendor/silverstripe/cms/_config.php on line 15