Fatal error: Uncaught Error: Class "yii\helpers\BaseJson" not found in /mnt/disk1/hosted/cuadro_mando/vendor/yiisoft/yii2/helpers/Json.php:17 Stack trace: #0 {main} thrown in /mnt/disk1/hosted/cuadro_mando/vendor/yiisoft/yii2/helpers/Json.php on line 17