Fatal error: Uncaught Error: Class 'yii\gii\Generator' not found in /var/www/html/vendor/yiisoft/yii2-gii/src/generators/controller/Generator.php:28 Stack trace: #0 {main} thrown in /var/www/html/vendor/yiisoft/yii2-gii/src/generators/controller/Generator.php on line 28