Fatal error: Uncaught Error: Class "yii\base\Widget" not found in /var/www/html/prod/vendor/webvimark/multilanguage/language_selector_widget/LanguageSelector.php:9 Stack trace: #0 {main} thrown in /var/www/html/prod/vendor/webvimark/multilanguage/language_selector_widget/LanguageSelector.php on line 9