错误 0xC00CE020：应用程序清单验证错误：应用程序清单必须根据架构有效，，缺少必需的属性“ForegroundText”

Question

Launched a "blank Windows 10 Universal App" using "Visual Studio 2015 RC". I am not able to see the design view for MainPage.xaml. The designer shows the following Error:

error 0xC00CE020: App manifest validation error: The app manifest must be valid as per schema: Line 20, Column 8, Reason: Required attribute 'ForegroundText' is missing

Tried including 'ForegroundText="dark"' attribute in Package.appxmanifest file but the attribute seems to be undeclared for VisualElements.

     <uap:VisualElements
          DisplayName="BackgroundSensorsCS"
          Square150x150Logo="Assets\squareTile-sdk.png"
          Square44x44Logo="Assets\SmallTile-sdk.png"
          Description="BackgroundSensorsCS"
          BackgroundColor="#00b2f0"
          **ForegroundText="dark"**>
            <uap:SplashScreen Image="Assets\Splash-sdk.png" />
            <uap:DefaultTile>
                <uap:ShowNameOnTiles>
                    <uap:ShowOn Tile="square150x150Logo" />
                </uap:ShowNameOnTiles>
            </uap:DefaultTile>
        </uap:VisualElements>

Answer 1

在 Windows 10 Preview, Build 10074 上重新安装 Visual Studio 2015 RC 后，该问题得到解决。

Answer 2

Somehow, I started experiencing a similar issue while developing a UWP app. It said some 'Wide..' attribute was not defined in the DTD. So I went to the project's properties > Application and tried to open the package manifest. I then deleted the faulty attribute from the manifest xml, restarted VS and opened package manifest file again which opened this time fine.

So, something there seems to have fixed the issue. Also, I cleaned the deployment inside bin > Debug and re-deployed, which worked this time.

Answer 3

For me, today, Visual Studio 2022, this happened after adding Badge Logos to the Visual Assets in the App Manifest, for store distribution. Apparently, when you add badges it is assumed you are receiving notifications, and you are required to select "Lock screen notifications" in the "Application" tab in the package manifest editor. Once you select Lock screen notifications: Badge the error disappears. Or, remove the Badge Logos if you don't need them.

Answer 4

I was able to fix it by selecting Lock screen notifications item.

Answer 5

Solution Explorer -> Package.appxmanifest -> right click -> View code -> Find the tag: <mp:PhoneIdentity PhoneProductId="### GUID ###" -> Add property PhonePublisherId="### GUID ###"

I've added the same ID like my publisher ID

Good luck...