from simple_knn._C import distCUDA2

I've installed "simple-knn" using the command "pip install -e submodules/simple-knn". However, when I run the script gaussian_model.py, I encounter an error stating that "from simple_knn._C import distCUDA2" is incorrect. Upon checking the simple_knn library in the Remote Libraries, I found only one file named '.gitkeep' instead of "._C". Does anyone know what might have caused this discrepancy?