Thanks for the update.
Based on your description you’ve installed the pip wheels, which ship with their CUDA runtime as well as cudnn (8.0.5). Your local CUDA toolkit and cudnn won’t be used in this case.
Since you are using a local CUDA10.1 installation, I guess your NVIDIA driver might be a bit older?
Could you check it via nvidia-smi and make sure it’s new enough to run the CUDA11.1 runtime from the pip wheels? (Table1 5 gives you an overview of the driver requirements)