Fatal error: Uncaught Error: Class 'Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher' not found in D:\svn\blog\vendor\symfony\http-kernel\Debug\TraceableEventDispatcher.php:24 Stack trace: #0 {main} thrown in D:\svn\blog\vendor\symfony\http-kernel\Debug\TraceableEventDispatcher.php on line 24