WindowsAppSDK: Failed to submit to Microsoft Store because of no Microsoft.ui.xaml.dll

Describe the bug

Microsoft Store Report App Team rejects the app submission because it unexpectedly terminated at launch. The app targets .NET 6 Windows 10.0.22000 and Windows App SDK 1.0.1. Event viewer shows that unable to load DLL ‘Microsoft.ui.xaml.dll’ or one of its dependencies.

However, the app can run in my dev environment.

For reference, following are the details of the app in Microsoft Partner Center. But of course, you can’t find it directly in Microsoft Store because its first submission is rejected several times. Maybe you can contact Microsoft Store Report App Team (reportap@microsoft.com) to get details and repro.

Key	Value
App ID	9NBLGGH4NBXB
App name	爱奇艺 Preview
App name in English	iQIYI Preview
Package ID	0C72C7CD.61910B44FC902

Following is the file output from event viewer by Microsoft Store Report App Team.

• AppEventLog.zip

Steps to reproduce the bug

1. Create a WinUI 3 packaged app with some features. Ensure it can run correctly.
2. Package it.
3. Submit it to Microsoft Store.

Expected behavior

It can be available in Microsoft Store.

That means it won’t crash anymore during reviewing by Microsoft Store Report App Team and running in end-users’ devices.

Screenshots

Following is the report about the reason the team of Microsoft Store rejects the submission. It says the app crashes at launch.

Following is the screenshot that the app runs correctly in my local dev environment.

It also works well by launch from Start Menu without debug in my local environment.

NuGet package version

1.0.0

Packaging type

Packaged (MSIX)

Windows version

Windows 11 version 21H2 (22000)

IDE

Visual Studio 2022

Additional context

It says…

The process was terminated due to an unhandled exception. Exception Info: System.DllNotFoundException: Unable to load DLL ‘Microsoft.ui.xaml.dll’ or one of its dependencies: The specified module could not be found. (0x8007007E) at IQIYI.UI.Program.Main(String[] args)

Following is an excerpt from the PropertyGroup section of the app project file (.csproj).

<OutputType>WinExe</OutputType>
<TargetFramework>net6.0-windows10.0.22000.0</TargetFramework>
<TargetPlatformMinVersion>10.0.22000.0</TargetPlatformMinVersion>
<AssemblyName>iQIYI</AssemblyName>
<RootNamespace>IQIYI.UI</RootNamespace>
<ApplicationManifest>app.manifest</ApplicationManifest>
<Platforms>x86;x64</Platforms>
<RuntimeIdentifiers>win10-x86;win10-x64</RuntimeIdentifiers>
<PublishProfile>win10-$(Platform).pubxml</PublishProfile>
<UseWinUI>true</UseWinUI>
<EnablePreviewMsixTooling>true</EnablePreviewMsixTooling>
<Product>iQIYI</Product>
<Authors>Kingcean Tuan</Authors>
<Company>iQIYI, Inc.</Company>
<Version>6.0.160</Version>
<AssemblyVersion>6.0.160.0</AssemblyVersion>
<FileVersion>6.0.160.0</FileVersion>
<Description>iQIYI Windows app.</Description>
<Copyright>Copyright (c) 2022 iQIYI, Inc. All rights reserved.</Copyright>
<RepositoryType>git</RepositoryType>
<DefaultLanguage>zh-Hans</DefaultLanguage>
<AppxAutoIncrementPackageRevision>False</AppxAutoIncrementPackageRevision>
<ApplicationIcon>..\iQIYI.ico</ApplicationIcon>

Related package references.

• Microsoft.WindowsAppSDK: 1.0.1.
• Microsoft.Windows.SDK.BuildTools: 10.0.22000.197.

P.S.: The app is the official UWP app in next generation of iQIYI (the top streaming platform hosted in mainland China).