Fatal error: Uncaught Error: Class 'yii\base\Behavior' not found in /data/htmlwww/workspace/web-tubanzhang/baseapp/behaviors/ValidatorBehavior.php:9 Stack trace: #0 {main} thrown in /data/htmlwww/workspace/web-tubanzhang/baseapp/behaviors/ValidatorBehavior.php on line 9