Fatal error: Uncaught Error: Class "Yii" not found in /var/www/html/server/vendor/azbuco/yii2-user/tests/_app/views/layouts/main.php:5 Stack trace: #0 {main} thrown in /var/www/html/server/vendor/azbuco/yii2-user/tests/_app/views/layouts/main.php on line 5