Fatal error: Uncaught Error: Class 'Symfony\Component\EventDispatcher\Event' not found in C:\SistemasPHP\observatorio4\vendor\symfony\http-kernel\Event\KernelEvent.php:23
Stack trace:
#0 {main}
thrown in C:\SistemasPHP\observatorio4\vendor\symfony\http-kernel\Event\KernelEvent.php on line 23