Fatal error: Uncaught Error: Class "yii\base\Widget" not found in /home/tandomain/projects.codersinsight.co.tz/hrsystem/frontend/theme/widgets/Alert.php:26 Stack trace: #0 {main} thrown in /home/tandomain/projects.codersinsight.co.tz/hrsystem/frontend/theme/widgets/Alert.php on line 26