Fatal error: Uncaught Error: Class "Symfony\Component\DependencyInjection\Extension\Extension" not found in I:\www\frameworks\Symfony\doctrine\vendor\symfony\web-profiler-bundle\DependencyInjection\WebProfilerExtension.php:34 Stack trace: #0 {main} thrown in I:\www\frameworks\Symfony\doctrine\vendor\symfony\web-profiler-bundle\DependencyInjection\WebProfilerExtension.php on line 34