Fatal error: Uncaught Error: Class "yii\widgets\Menu" not found in /var/www/html/prod/vendor/kartik-v/yii2-widget-sidenav/SideNav.php:49 Stack trace: #0 {main} thrown in /var/www/html/prod/vendor/kartik-v/yii2-widget-sidenav/SideNav.php on line 49