On the brand logo link replace the / href with . <?php echo Yii::getAlias('@backendUrl') ?>

<a href="<?php echo Yii::getAlias('@backendUrl') ?>" class="brand-link text-center <?php echo $keyStorage->get('adminlte.brand-text-small') ? 'text-sm' : null ?>">

in some cases for single domain some links not work correctly.

Thanks a lot

@kiwi179 proposes a lookup set for additional functionality

https://wellsb.com/csharp/aspnet/code-first-ef-core-lookup-table-blazor/
https://coding.abel.nu/2013/11/enums-and-lookup-tables-with-ef-code-first/