Fatal error: Uncaught Error: Class "yii\validators\Validator" not found in /var/www/binary/vendor/himiklab/yii2-recaptcha-widget/src/ReCaptchaBaseValidator.php:21 Stack trace: #0 {main} thrown in /var/www/binary/vendor/himiklab/yii2-recaptcha-widget/src/ReCaptchaBaseValidator.php on line 21