Fatal error: Uncaught Error: Class 'yii\behaviors\AttributeBehavior' not found in /var/www/html/autocar/vendor/yiisoft/yii2/behaviors/SluggableBehavior.php:64 Stack trace: #0 {main} thrown in /var/www/html/autocar/vendor/yiisoft/yii2/behaviors/SluggableBehavior.php on line 64