FilePicker does not open when running as administrator

[shinta0806]

Describe the bug

FilePicker does not open when running as administrator.
(Attempted to perform an unauthorized operation exception)
(Open when running as a general user)

Steps to reproduce the bug

1. Run WinUI 3 program as administrator.
2. Open FileSavePicker.
3. Attempted to perform an unauthorized operation exception

Sample program in GitHub:
https://github.com/shinta0806/TestFilePicker
(This sample program is for #9387, but reproduce this bug, too)

Expected behavior

No response

Screenshots

NuGet package version

WinUI 3 - Windows App SDK 1.5.1: 1.5.240311000

Windows version

Windows 11 (22H2): Build 22621

Additional context

No response

[DarranRowe]

Yes, this is a pretty well known issue in Windows. There is also a report over on the WindowsAppSDK repository. microsoft/WindowsAppSDK#2504

[shinta0806]

Thank you!