Fatal error: Uncaught Error: Class "yii\base\Action" not found in /var/www/binary/vendor/kartik-v/yii2-widget-depdrop/src/DepDropAction.php:66 Stack trace: #0 {main} thrown in /var/www/binary/vendor/kartik-v/yii2-widget-depdrop/src/DepDropAction.php on line 66