Fatal error: Uncaught Error: Class "Symfony\Component\HttpKernel\DependencyInjection\Extension" not found in I:\www\picman\vendor\symfony\framework-bundle\DependencyInjection\FrameworkExtension.php:207 Stack trace: #0 {main} thrown in I:\www\picman\vendor\symfony\framework-bundle\DependencyInjection\FrameworkExtension.php on line 207