Fatal error: Uncaught Error: Class "Symfony\Component\Console\Event\ConsoleEvent" not found in /home2/yiikharazmisabt/public_html/yii2-app/vendor/symfony/console/Event/ConsoleCommandEvent.php:19 Stack trace: #0 {main} thrown in /home2/yiikharazmisabt/public_html/yii2-app/vendor/symfony/console/Event/ConsoleCommandEvent.php on line 19