Fix CalledProcessError

✅ Solution

The "CalledProcessError" in bitsandbytes often arises from CUDA version mismatches or incomplete/incorrect installation of CUDA-related libraries required by bitsandbytes. Ensure your CUDA toolkit version (nvcc --version) matches the bitsandbytes CUDA version (e.g., bitsandbytes_cuda123 needs CUDA 12.3). Reinstall bitsandbytes using `pip uninstall bitsandbytes` followed by a targeted install: `pip install bitsandbytes --prefer-binary --extra-index-url=https://huggingface.github.io/bitsandbytes-wheels/` to fetch pre-compiled wheels compatible with your system.