Warning: The use statement with non-compound name 'Yii' has no effect in /mnt/www/fwrsxt/passport/views/layouts/navbar2.php on line 4

Fatal error: Uncaught Error: Class 'Yii' not found in /mnt/www/fwrsxt/passport/views/layouts/navbar2.php:5 Stack trace: #0 {main} thrown in /mnt/www/fwrsxt/passport/views/layouts/navbar2.php on line 5