On macOS, you might need:

npm config set python /usr/bin/python

This ensure Python 2, as needed by node-gyp, as used by "npm install java"

Install JS deps

npm install

Probably will need to rebuild electron for this node version:

./node_modules/.bin/electron-rebuild
node ./node_modules/java/postInstall.js

./node_modules/.bin/node-java-maven

npm start