Fatal error: Uncaught Error: Class 'Sensio\Bundle\FrameworkExtraBundle\Configuration\ParamConverter' not found in C:\Apache24\htdocs\cwbts\vendor\sensio\framework-extra-bundle\src\Configuration\Entity.php:21 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cwbts\vendor\sensio\framework-extra-bundle\src\Configuration\Entity.php on line 21