Fatal error: Uncaught Error: Class "yii\base\Action" not found in /var/www/html/web/yii/basic/vendor/yiisoft/yii2-debug/src/actions/db/ExplainAction.php:22 Stack trace: #0 {main} thrown in /var/www/html/web/yii/basic/vendor/yiisoft/yii2-debug/src/actions/db/ExplainAction.php on line 22