hololens app cannot start

Unity Engine
, ,
1

using unity 2020.3.19f1 and open xr latest
hololens2 device

it runs well in unity editor, and build succeed, and generated vs solution build succeed.

but it cannot start in hololens. after start my app, it just show a blank window with a cross (this window is common in hololens), and nothing happens, only the window, not even “build wit unity”

when i debug, it show these error:

Unhandled exception at 0x00007FFA58E4581C in _HololensApp.exe: Microsoft C++ exception: Il2CppExceptionWrapper at memory location 0x000000ACB80FF7D0.

and

onecore\net\netprofiles\service\src\nsp\dll\namespaceserviceprovider.cpp(547)\nlansp_c.dll!00007FFA43A78188: (caller: 00007FFA5927D178) LogHr(1) tid(25c) 8007277C No such service is known. The service cannot be found in the specified name space.
'_HololensApp.exe' (Win32): Loaded 'C:\Windows\system32\Windows.ApplicationModel.dll'.
onecore\base\AppModel\Runtime\Src\PackagePath.hpp(144)\kernelbase.dll!00007FFA58E4D7C0: (caller: 00007FFA58E4D4F8) ReturnHr(1) tid(25c) 80073D5B The package does not have a mutable directory.
Exception thrown at 0x00007FFA58E4581C in _HololensApp.exe: Microsoft C++ exception: Il2CppExceptionWrapper at memory location 0x000000ACB80FF680.
Exception thrown at 0x00007FFA58E4581C in _HololensApp.exe: Microsoft C++ exception: Il2CppExceptionWrapper at memory location 0x000000ACB80FF7D0.
Unhandled exception at 0x00007FFA58E4581C in _HololensApp.exe: Microsoft C++ exception: Il2CppExceptionWrapper at memory location 0x000000ACB80FF7D0.

besides, my app runs well in hololens 1 month ago, after 1 month more development, it became this

thanks for help!!!

2

Microsoft is responsible for the OpenXR extensions for HoloLens, and you might have better luck asking in a Microsoft forum. https://techcommunity.microsoft.com/t5/mixed-reality/ct-p/MicrosoftMixedReality

You may also find some help in their documentation: Choosing a Unity version and XR plugin - Mixed Reality | Microsoft Learn