Fatal error: Uncaught Error: Interface 'Symfony\Component\EventDispatcher\EventDispatcherInterface' not found in /var/www/up.tantal-metall.com/yii_up/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php:30 Stack trace: #0 {main} thrown in /var/www/up.tantal-metall.com/yii_up/vendor/symfony/event-dispatcher/Debug/TraceableEventDispatcher.php on line 30