Fatal error: Uncaught Error: Class "yii\base\Behavior" not found in /var/www/html/web/yii/basic/vendor/yiisoft/yii2/behaviors/CacheableWidgetBehavior.php:47 Stack trace: #0 {main} thrown in /var/www/html/web/yii/basic/vendor/yiisoft/yii2/behaviors/CacheableWidgetBehavior.php on line 47