Fatal error: Uncaught Error: Class 'Doctrine\Common\Persistence\Mapping\Driver\FileDriver' not found in /home/app/htdocs/ninja/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/Driver/PHPDriver.php:35 Stack trace: #0 {main} thrown in /home/app/htdocs/ninja/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Mapping/Driver/PHPDriver.php on line 35