System.NotImplementedException when a PhotoCaptureFrame instantiated

PhotoCapture seems to trigger an internal error when it recieves a frame from the camera. (See stack trace at bottom, error is thrown from PhotoCaptureFrame's constructor inside InvokeOnCapturedPhotoToMemoryDelegate.)

Code (csharp):

1. Exception thrown: 'System.NotImplementedException' in WinRTBridge.dll
2. 'testapp.exe' (CoreCLR: CoreCLR_UWP_Domain): Loaded 'C:\Data\Users\DefaultAccount\AppData\Local\DevelopmentFiles\testappVS.Release_x86.testuser\System.Diagnostics.StackTrace.dll'. Cannot find or open the PDB file.
3. Exception: The method or operation is not implemented.
4. Type: System.NotImplementedException
5. Module: WinRTBridge
6. InnerException: <No Data>
7. AdditionalInfo:MarshalFirstFieldIntoNativePtr type: UnityEngine.XR.WSA.WebCam.PhotoCaptureFrame
8.    at WinRTBridge.Marshalling.MarshalFirstFieldIntoNativePtr(Object instance)
9. (Filename:  Line: 0)
10.  
11. Exception thrown: 'System.ArgumentNullException' in UnityEngineProxy.dll
12. ArgumentNullException: Value cannot be null.
13. Parameter name: _unity_self
14.    at UnityEngineProxy.InternalCalls.PhotoCaptureFrame_CUSTOM_GetDataLength(Object self)
15.    at UnityEngine.XR.WSA.WebCam.PhotoCaptureFrame..ctor(IntPtr nativePtr)
16.    at UnityEngine.XR.WSA.WebCam.PhotoCapture.InvokeOnCapturedPhotoToMemoryDelegate(OnCapturedToMemoryCallback callback, Int64 hResult, IntPtr photoCaptureFramePtr)
17.    at UnityEngine.XR.WSA.WebCam.PhotoCapture.$Invoke10(Int64 instance, Int64* args)
18.    at UnityEngine.Internal.$MethodUtility.InvokeMethod(Int64 instance, Int64* args, IntPtr method)
19. (Filename: <Unknown> Line: 0)

This has been reported by other users in these MixedRealityToolkit issues:
https://github.com/Microsoft/MixedRealityToolkit-Unity/issues/2919
https://github.com/Microsoft/MixedRealityToolkit/issues/182

 

Duplicate of https://forum.unity.com/threads/hololens-photo-capturing-failing.548845/