Fatal error: Uncaught Error: Class "Doctrine\ORM\Query\ResultSetMapping" not found in /home/zdpktgd/ptc/vendor.old/doctrine/orm/src/Query/ResultSetMappingBuilder.php:21 Stack trace: #0 {main} thrown in /home/zdpktgd/ptc/vendor.old/doctrine/orm/src/Query/ResultSetMappingBuilder.php on line 21