Fatal error: Uncaught Error: Class 'Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher' not found in /home/app3/public_html/service/vendor/symfony/http-kernel/Debug/TraceableEventDispatcher.php:26 Stack trace: #0 {main} thrown in /home/app3/public_html/service/vendor/symfony/http-kernel/Debug/TraceableEventDispatcher.php on line 26