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