Fatal error: Uncaught Error: Class "yii\bootstrap\Widget" not found in /mnt/disk1/hosted/cuadro_mando/vendor/yiisoft/yii2-bootstrap/Nav.php:54 Stack trace: #0 {main} thrown in /mnt/disk1/hosted/cuadro_mando/vendor/yiisoft/yii2-bootstrap/Nav.php on line 54