You can't run a standalone player forcing a specific gfx api if project wasn't build with this gfx API.
Repro project is set to "auto graphics API", so it only contains directx11 API by default till Unity 6.0.
If you try to run player with -force-d3d12 it can't render properly because of missing compute shader.
Up to Unity 6.1 the build settings automatically include both dx11 and dx12 gfx API when building. So running standalone with "-force-d3d12" would work.