Fatal error: Uncaught Error: Class 'yii\db\ActiveQuery' not found in /home/luxurytr/public_html/lt8/vendor/creocoder/yii2-nested-sets/tests/models/TreeQuery.php:15 Stack trace: #0 {main} thrown in /home/luxurytr/public_html/lt8/vendor/creocoder/yii2-nested-sets/tests/models/TreeQuery.php on line 15