Fatal error: Uncaught Error: Class "yii\helpers\StringHelper" not found in /var/www/firstlan.uchetprosto.ru/vendor/yiisoft/yii2-gii/src/generators/crud/default/controller.php:13 Stack trace: #0 {main} thrown in /var/www/firstlan.uchetprosto.ru/vendor/yiisoft/yii2-gii/src/generators/crud/default/controller.php on line 13