There is no needed the "/" before closing.
@@ -14,7 +14,7 @@ AppAsset::register($this);
<!DOCTYPE html>
<html lang="<?= Yii::$app->language ?>">
<head>
- <meta charset="<?= Yii::$app->charset ?>"/>
+ <meta charset="<?= Yii::$app->charset ?>">
<meta name="viewport" content="width=device-width, initial-scale=1">
<?= Html::csrfMetaTags() ?>
<title><?= Html::encode($this->title) ?></title>
Alex Solomaha