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Notice: Trying to get property of non-object in /var/www/html/forms_dir/vendor/kartik-v/yii2-dynagrid/src/views/config.php on line 34

Fatal error: Uncaught Error: Class 'yii\helpers\ArrayHelper' not found in /var/www/html/forms_dir/vendor/kartik-v/yii2-dynagrid/src/views/config.php:35 Stack trace: #0 {main} thrown in /var/www/html/forms_dir/vendor/kartik-v/yii2-dynagrid/src/views/config.php on line 35