Attribute error in NVDIA DIGITS installation

Question

I tried to install NVIDIA DIGITS on ubuntu 14.04

I followed this website to install all the pre-requisites: https://github.com/NVIDIA/DIGITS/blob/master/docs/BuildDigits.md I couldn't set up the server

The command: ./digits-devserver returned this:

The first part

The second part

Please let me know how I can tackle this attribute error(AttributeError: 'module' object has no attribute 'nanprod')