Fatal error: Uncaught Error: Interface "Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcherInterface" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\event-dispatcher\Debug\TraceableEventDispatcher.php:33 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\event-dispatcher\Debug\TraceableEventDispatcher.php on line 33