Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DependencyInjection\Extension" not found in C:\xampp\htdocs\electronica\vendor\jms\di-extra-bundle\JMS\DiExtraBundle\DependencyInjection\JMSDiExtraExtension.php:34 Stack trace: #0 {main} thrown in C:\xampp\htdocs\electronica\vendor\jms\di-extra-bundle\JMS\DiExtraBundle\DependencyInjection\JMSDiExtraExtension.php on line 34