Fatal error: Uncaught Error: Class "Symfony\Component\EventDispatcher\Event" not found in /home/stormiscoming/mymosaic/src/Entity/Pavilion/Event/PavilionEvent.php:7 Stack trace: #0 {main} thrown in /home/stormiscoming/mymosaic/src/Entity/Pavilion/Event/PavilionEvent.php on line 7