Fatal error: Uncaught Error: Class 'kartik\base\Widget' not found in /var/www/html/ng-crm/yiiapp/vendor/kartik-v/yii2-popover-x/src/PopoverX.php:40 Stack trace: #0 {main} thrown in /var/www/html/ng-crm/yiiapp/vendor/kartik-v/yii2-popover-x/src/PopoverX.php on line 40