Fatal error: Uncaught Error: Class 'yii\db\Exception' not found in /var/www/html/ng-crm/yiiapp/vendor/yiisoft/yii2-redis/src/SocketException.php:16 Stack trace: #0 {main} thrown in /var/www/html/ng-crm/yiiapp/vendor/yiisoft/yii2-redis/src/SocketException.php on line 16