Fatal error: Uncaught Error: Class 'yii\helpers\ArrayHelper' not found in /opt/lampp/htdocs/123playnow-external/vendor/execut/yii2-base/tests/unit/_config.php:2 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/123playnow-external/vendor/execut/yii2-base/tests/unit/_config.php on line 2