Fatal error: Uncaught Error: Class 'Symfony\Component\HttpKernel\DependencyInjection\Extension' not found in /home/lafaamicps/www/symfony/vendor/friendsofsymfony/user-bundle/FOS/UserBundle/DependencyInjection/FOSUserExtension.php:20 Stack trace: #0 {main} thrown in /home/lafaamicps/www/symfony/vendor/friendsofsymfony/user-bundle/FOS/UserBundle/DependencyInjection/FOSUserExtension.php on line 20