"with the official Avisynth+ build from Github."
Yes - I also setup latest 'release' 3.7.1 at my the only working system with GTX1060. I think of creating debug build also it have enabled DirectX debug layer - it can be installed as part of Windows 10 user-side and may be will shows more detailed errors. It may be something around structured exceptions handling - may be it is disabled in release build so exception do not catched in the underlying layers and passed to AVS+ host.
Here is debug build -
https://drive.google.com/file/d/1yEN...ew?usp=sharing . Also added exception handling around loading of Compute.cso file. It have builds with 2 types of C++ exception handling - EHa and EHsc in VS2019 settings - may it helps.
*updated link to archive with debug MS .dlls included*