Fatal error: Uncaught Error: Class 'Symfony\Component\Security\Http\Firewall\AbstractListener' not found in /home/itscm/dev.its.cm/itsgateway/vendor/symfony/security-http/Firewall/LogoutListener.php:33 Stack trace: #0 {main} thrown in /home/itscm/dev.its.cm/itsgateway/vendor/symfony/security-http/Firewall/LogoutListener.php on line 33