Fatal error: Uncaught Error: Class 'Symfony\Component\EventDispatcher\EventDispatcher' not found in /home/app/htdocs/lidia/vendor/symfony/http-kernel/Tests/Fixtures/TestEventDispatcher.php:17 Stack trace: #0 {main} thrown in /home/app/htdocs/lidia/vendor/symfony/http-kernel/Tests/Fixtures/TestEventDispatcher.php on line 17