Fatal error: Uncaught Error: Class "yii\validators\Validator" not found in /var/www/html/web/yii/basic/vendor/yiisoft/yii2/validators/CompareValidator.php:34 Stack trace: #0 {main} thrown in /var/www/html/web/yii/basic/vendor/yiisoft/yii2/validators/CompareValidator.php on line 34