Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher" not found in C:\www\Apache24\htdocs\agenda-dif\vendor\symfony\http-kernel\Debug\TraceableEventDispatcher.php:24 Stack trace: #0 {main} thrown in C:\www\Apache24\htdocs\agenda-dif\vendor\symfony\http-kernel\Debug\TraceableEventDispatcher.php on line 24