Fatal error: Uncaught Error: Class "yii\base\Widget" not found in /var/www/html/prod/vendor/asofter/yii2-imperavi-redactor/yii/imperavi/Widget.php:31 Stack trace: #0 {main} thrown in /var/www/html/prod/vendor/asofter/yii2-imperavi-redactor/yii/imperavi/Widget.php on line 31