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I'm working on HoloLens 2 through Unity. I developed a lot of applications that work perfectly, but since two weeks I have some issues with the HL2: Visual Studio gives the feedback that it was successfully build and successfully deployed however the application is nowhere to be seen on the HoloLens 2. In addiction, when I try to "start without debugging" I received the error 0x80070057.
I have two identical devices, but I have those kind of problems just on one of them. The second one is working properly.
I tried to unpair the device, restart it, update the softwares and the device.
I am working with: Unity 2021.3.27f1
Visual Studio 2019 (v16.11.29)
Visual Studio 2022 (v17.6.3)
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Hello, Welcome to Microsoft Q&A,
What is the OS version of your HoloLens? Visual Studio 2022 is recommended, and it is recommended to update it to the latest version.
What is the complete error message of error 0x80070057? Will this error occur when deploying all applications?
You can try to package the application through Visual Studio and then install it through Device Portal. Please refer to Packaging MSIX apps - MSIX | Microsoft Learn and Using the Windows Device Portal - Mixed Reality | Microsoft Learn. Please also check if you can see previously installed applications in Device Portal.