Fatal error: Uncaught Error: Class 'Yii' not found in D:\phpStudy\WWW\Soeasy\vendor\yiisoft\yii2-gii\src\views\layouts\generator.php:9 Stack trace: #0 {main} thrown in D:\phpStudy\WWW\Soeasy\vendor\yiisoft\yii2-gii\src\views\layouts\generator.php on line 9