Fatal error: Uncaught Error: Class 'yii\helpers\Html' not found in /home/trafqete/public_html/vendor/yiisoft/yii2-bootstrap/src/BaseHtml.php:20 Stack trace: #0 {main} thrown in /home/trafqete/public_html/vendor/yiisoft/yii2-bootstrap/src/BaseHtml.php on line 20