Fatal error: Uncaught Error: Class "Doctrine\ORM\Query\ResultSetMapping" not found in /home/technoon/public_html/askon/vendor/doctrine/orm/lib/Doctrine/ORM/Query/ResultSetMappingBuilder.php:26 Stack trace: #0 {main} thrown in /home/technoon/public_html/askon/vendor/doctrine/orm/lib/Doctrine/ORM/Query/ResultSetMappingBuilder.php on line 26