Fatal error: Uncaught Error: Class 'yii\behaviors\AttributeBehavior' not found in /var/www/html/autocar/vendor/yiisoft/yii2/behaviors/OptimisticLockBehavior.php:65 Stack trace: #0 {main} thrown in /var/www/html/autocar/vendor/yiisoft/yii2/behaviors/OptimisticLockBehavior.php on line 65