Fatal error: Uncaught Error: Class 'Doctrine\ORM\Query\ResultSetMapping' not found in /home/benjamincb/demos/acdg/vendor/doctrine/orm/lib/Doctrine/ORM/Query/ResultSetMappingBuilder.php:24 Stack trace: #0 {main} thrown in /home/benjamincb/demos/acdg/vendor/doctrine/orm/lib/Doctrine/ORM/Query/ResultSetMappingBuilder.php on line 24