Fatal error: Uncaught Error: Class "Symfony\Contracts\EventDispatcher\Event" not found in /var/www/html/usophy/vendor/symfony/http-kernel/Event/KernelEvent.php:23
Stack trace:
#0 {main}
thrown in /var/www/html/usophy/vendor/symfony/http-kernel/Event/KernelEvent.php on line 23