Windows setup fails: Cannot download CUDA backend binaries

[viktak]

Trying to evaluate this but I couldn't even set it up. On a Windows 11 Pro box I unzipped the repo in a new folder, ran windows.bat, and I get this error:

  [1/4] Setting up portable Node.js (app/tools/node-win/)
  --------------------------------------------------------
   OK  Portable Node.js already ready: v22.12.0

  [2/4] Setting up stable-diffusion.cpp CUDA GPU backend (app/backend/win/cuda/)
  --------------------------------------------------------
   >>  Downloading: stable-diffusion.cpp CUDA Backend (Windows x64)

  [#####-------------------------------------------] 10%  34.6 MB / 334.7 MB  34.7 MB/s  ETA 0m9s
   XX  Download failed: Exception calling "Read" with "3" argument(s): "The decryption operation failed, see inner exception."
   XX  Cannot download CUDA backend binaries.

Then it hangs. I can terminate the batch. Repairing does the same.

Any idea what the problem may be?