I ran into this issue last night, and now I have another issue but i solved by
- using NVM change to nodejs to version 6
- removing node_modules folder
- then NPM install
- and then doing the following found here,
https://github.com/zone117x/node-multi-hashing/issues/31apt-get install -y build-essential git
cd node_modules
git clone https://github.com/UNOMP/node-multi-hashing
cd node-multi-hashing
git fetch origin pull/5/head:BRANCHNAME
git checkout BRANCHNAME
npm install
Appears to have sorted it for me, but now I have an issue with bignum and it expect version 48 and getting 46