Fatal error: Uncaught Error: Class 'yii\helpers\ArrayHelper' not found in /opt/lampp/htdocs/squidv2-stage/vendor copy/kartik-v/yii2-dynagrid/views/config.php:27 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/squidv2-stage/vendor copy/kartik-v/yii2-dynagrid/views/config.php on line 27