Apple Music App Installed from Microsoft Store No Longer Working on Windows 11, found issue after two days

after two days of testing all things, local windows 11 health of all apps and files, firewall and defender settings, found the issue with Apply Music, iTunes, Apple TV and all come down to one thing, Apple music can sign in online, but not on the app on Windows 11, I have posted this on apple site also and got a thumbs up from apple but Microsoft needs to also be aware

The issue is apple is fine but the exchange fails with Microsoft.UI.Xaml.dll

Version 3.1.8.0 this is on windows 11 25H2 version OS build 26200.9445

the exchange of info with apple music and Microsoft.UI.Xaml.dll fails every time, maybe a timeout or something

This has been tested with different profiles and removing security and making sure all are up to date, this is a world wide issue with no fix from Microsoft or Apple yet.

APPLE MUSIC SIGN IN TROUBLESHOOTING SUMMARY

Issue

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Apple Music installs and opens normally on Windows 11.

Apple ID and password are accepted in the sign in process.

No error message is displayed.

Apple Music remains signed out after authentication.

System Configuration

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Windows 11 running under a Local Account.

Microsoft Store signed in with Microsoft account.

Apple ID signs in successfully through the Apple website.

Apple Music installed from Microsoft Store.

Actions Completed

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Removed all Apple software including Apple Music and iTunes.

Rebooted Windows.

Installed Apple Music only.

Verified Apple ID credentials through Apple's website.

Signed out of Microsoft Store and back in.

Ran:

wsreset.exe

Reinstalled Apple Music.

Attempted desktop authorisation.

Checked Event Viewer logs.

Event Log Findings

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DistributedCOM Event 10016

Source:

DistributedCOM

Related Component:

Windows.SecurityCenter.WscDataProtection

Assessment:

Common Windows warning.

Not believed to be related to Apple Music sign in failure.

Netwtw10 Event 6062

Source:

Netwtw10

Assessment:

Intel wireless adapter warning.

Not related to Apple Music.

Application Error Event 1000

Faulting Application:

TiWorker.exe

Assessment:

Windows Update component.

Not related to Apple Music.

Microsoft Store Authentication Error

Log:

Microsoft-Windows-Store/Operational

Source:

Windows-ApplicationModel-Store-SDK

Event ID:

2

Exception:

WinStore.Identity.AuthenticationException

Message:

Error initializing default system account. Returning NULL.

Assessment:

Most significant error found during troubleshooting.

May indicate a Store identity or account authentication issue.

WebView2 Investigation

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Registry check:

reg query "HKLM\SOFTWARE\Microsoft\EdgeUpdate\Clients"

Returned key not found.

Folder check confirmed:

C:\Program Files (x86)\Microsoft\EdgeWebView

exists.

Downloaded WebView2 Runtime installer.

Installer reported:

"The Microsoft Edge WebView2 Runtime is already installed for the system."

Assessment:

WebView2 is installed and operational.

Unlikely to be root cause.

App Package Re-registration

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Executed:

Get-AppXPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}

Results:

Microsoft Wallet package reported as end of life.

Weather package reported as in use.

Assessment:

Expected behaviour.

No indication these errors relate to Apple Music.

Microsoft.UI.Xaml.dll Investigation

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Microsoft.UI.Xaml.dll is part of Microsoft's Windows App SDK and Store app framework.

Apple Music and many Store applications depend on these components.

Potential symptoms of a damaged Microsoft.UI.Xaml environment include:

Store apps opening but not functioning correctly.

Authentication windows failing silently.

Sign in operations completing without errors but not being retained.

Unexpected Store application behaviour.

Current Status

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Confirmed:

Apple ID works online.

Microsoft Store account works.

WebView2 is installed.

Apple Music installs correctly.

No Apple Music crashes detected.

No Apple Music specific application errors found.

Most Likely Remaining Causes

---

Store identity authentication issue.

Windows Local Account interaction with Store authentication.

Microsoft.UI.Xaml or Windows App SDK component issue.

User profile corruption affecting Store applications.

Next Planned Test

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Convert Windows login from Local Account to Microsoft Account.

Reboot.

Open Microsoft Store and confirm account is connected.

Launch Apple Music and attempt sign in.

Expected Outcome

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If Apple Music signs in successfully after using a Microsoft Account for Windows login, the issue is likely related to Windows identity authentication.

If the problem remains, investigation should focus on Microsoft.UI.Xaml components, Windows App SDK packages, or user profile corruption.