error occurs when running " from modules.functional.backend import _backend "

[Carbord]

Hello! When running " from modules.functional.backend import _backend ", I encounter the following error :

It may result from the wrong version. Can you provide the versions about the pytorch, nvcc, etc to run this repostory?

I am using pytorch 1.11. And the "ncvv -V" shows :

while nvidia-smi shows :

I wonder how to correctly run the code to import the corresponding functions about pvcnn_backend. Sincerely looking forward to your help.