Fatal error: Uncaught Error: Class 'yii\bootstrap\Alert' not found in /home/trafqete/public_html/vendor/kartik-v/yii2-widget-alert/Alert.php:24 Stack trace: #0 {main} thrown in /home/trafqete/public_html/vendor/kartik-v/yii2-widget-alert/Alert.php on line 24