Since the last VTK update SlicerVirtualReality fails to build:

https://slicer.cdash.org/viewBuildError.php?buildid=3085845

D:\D\P\S-0-E-b\SlicerVirtualReality\VirtualReality\MRML\vtkVirtualRealityViewInteractor.h(49,16): error C3668: 'vtkVirtualRealityViewInteractor::HandleGripEvents': method with override specifier 'override' did not override any base class methods [D:\D\P\S-0-E-b\SlicerVirtualReality-build\inner-build\VirtualReality\MRML\vtkSlicerVirtualRealityModuleMRML.vcxproj] [D:\D\P\S-0-E-b\SlicerVirtualReality-build\inner.vcxproj]