Fatal error: Uncaught Error: Class 'yii\mongodb\Collection' not found in /var/www/html/ng-crm/yiiapp/vendor/yiisoft/yii2-mongodb/src/file/Collection.php:29 Stack trace: #0 {main} thrown in /var/www/html/ng-crm/yiiapp/vendor/yiisoft/yii2-mongodb/src/file/Collection.php on line 29