Fatal error: Uncaught Error: Class "yii\helpers\Html" not found in /var/www/html/prod/vendor/webvimark/multilanguage/language_selector_widget/views/dropDown.php:40 Stack trace: #0 {main} thrown in /var/www/html/prod/vendor/webvimark/multilanguage/language_selector_widget/views/dropDown.php on line 40