Fatal error: Uncaught Error: Class "Symfony\Component\Console\Event\ConsoleEvent" not found in T:\Xampp\htdocs\notice\vendor\symfony\console\Event\ConsoleSignalEvent.php:21 Stack trace: #0 {main} thrown in T:\Xampp\htdocs\notice\vendor\symfony\console\Event\ConsoleSignalEvent.php on line 21