Microsoft has told UploadVR it has ended production on HoloLens 2. HoloLens 2 will continue to get "updates to address critical security issues and software regressions" until the end of 2027.
Change the platform to UWP in the "Build Settings" window. Import and setup the Microsoft Mixed Reality Toolkit. (Recommend using MixedRealityFeatureTool) Import the OpenCVForUnity. Select ...