WindowsCopilotRuntime cs-winui sample cannot debug as UnPackaged App

[yeelam-gordon]

Repo steps:

1. Samples\WindowsCopilotRuntime\cs-winui\WindowsCopilotRuntimeSample.sln by vs2022
2. In the Debug profile, select for "WindowsCopilotRuntime (Unpackaged)
3. Add this line <WindowsAppSdkBootstrapInitialize>true</WindowsAppSdkBootstrapInitialize> in the csproj as part of build

Expected:

it can run without problem

Actual:

It failed with exception:
System.ArgumentException: 'Value does not fall within the expected range.' for the code StorageFile.GetFileFromApplicationUriAsync in StorageFileExtensions.cs