Fatal error: Uncaught Error: Class "yii\db\ActiveQuery" not found in /home/iscaljorge/devsaftXplore_in/vendor/creocoder/yii2-nested-sets/tests/models/MultipleTreeQuery.php:15 Stack trace: #0 {main} thrown in /home/iscaljorge/devsaftXplore_in/vendor/creocoder/yii2-nested-sets/tests/models/MultipleTreeQuery.php on line 15