Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\Event" not found in /home/tubu/public_html/Opigno_D9_kedecs/opigno-composer/vendor/symfony/event-dispatcher/LegacyEventProxy.php:20 Stack trace: #0 {main} thrown in /home/tubu/public_html/Opigno_D9_kedecs/opigno-composer/vendor/symfony/event-dispatcher/LegacyEventProxy.php on line 20