Fatal error: Uncaught Error: Class 'yii\base\Widget' not found in /var/www/html/ng-crm/yiiapp/backend/widgets/viewing/viewingTableShortcode.php:10 Stack trace: #0 {main} thrown in /var/www/html/ng-crm/yiiapp/backend/widgets/viewing/viewingTableShortcode.php on line 10