Fatal error: Uncaught Error: Class 'Symfony\Component\EventDispatcher\Tests\EventDispatcherTest' not found in /var/www/html/vendor/symfony/event-dispatcher/Tests/ChildEventDispatcherTest.php:16 Stack trace: #0 {main} thrown in /var/www/html/vendor/symfony/event-dispatcher/Tests/ChildEventDispatcherTest.php on line 16