我正在尝试为Unity 3D UWP项目中的悬崖房屋添加一个MixedReality 3D图标。

因此，我遵循了官方文档（https://docs.microsoft.com/en-us/windows/mixed-reality/implementing-3d-app-launchers），我的package.appxmanifest现在包含以下几行：

<Package xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest" xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10" xmlns:uap2="http://schemas.microsoft.com/appx/manifest/uap/windows10/2" xmlns:uap3="http://schemas.microsoft.com/appx/manifest/uap/windows10/3" xmlns:uap4="http://schemas.microsoft.com/appx/manifest/uap/windows10/4" xmlns:uap5="https://schemas.microsoft.com/appx/manifest/uap/windows10/5" xmlns:iot="http://schemas.microsoft.com/appx/manifest/iot/windows10" xmlns:mobile="http://schemas.microsoft.com/appx/manifest/mobile/windows10" IgnorableNamespaces="uap uap2 uap3 uap4 uap5 mp mobile iot" xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10">

和

<uap:DefaultTile ShortName="Kaldor - Your Public Art Project 2019" Wide310x150Logo="Assets\Wide310x150Logo.png" Square71x71Logo="Assets\Square71x71Logo.png" Square310x310Logo="Assets\Square310x310Logo.png">
  <uap:ShowNameonTiles>
    <uap:ShowOn Tile="square310x310Logo" />
    <uap:ShowOn Tile="wide310x150Logo" />
  </uap:ShowNameonTiles>
  <uap5:MixedRealityModel Path="Assets\StoreModel1.glb" />
</uap:DefaultTile>

但是我收到此控制台错误：

The element 'DefaultTile' in namespace 'http://schemas.microsoft.com/appx/manifest/uap/windows10' has invalid child element 'MixedRealityModel' in namespace 'https://schemas.microsoft.com/appx/manifest/uap/windows10/5'. List of possible elements expected: 'TileUpdate' in namespace 'http://schemas.microsoft.com/appx/manifest/uap/windows10' as well as 'MixedRealityModel' in namespace 'http://schemas.microsoft.com/appx/manifest/uap/windows10/5' as well as 'HoloContentChoice' in namespace 'http://schemas.microsoft.com/appx/manifest/uap/windows10'.

我已经按照文档和主题上的官方MS视频观看，看不到我错过的内容吗？