npm ERR! Cannot read property path of null

$ sudo npm install -g bean-sdk
sudo: npm: command not found
$ npm install -g bean-sdk
npm ERR! Linux 3.13.0-39-generic
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/bin/npm" "install" "-g" "bean-sdk"
npm ERR! node v4.4.5
npm ERR! npm  v4.0.5

npm ERR! Cannot read property 'path' of null
npm ERR! 
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>

npm ERR! Please include the following file with any support request:
npm ERR!     /home/jadeye/npm-debug.log


npm-debug.log
https://gist.github.com/jadeye/10f79dbb72a57eef9aef304794bbb94c

### supporting information:

 - `npm -v` prints: 4.0.5
 - `node -v` prints: v4.4.5
 - `npm config get registry` prints: https://registry.npmjs.org/
 - Windows, OS X/macOS, or Linux?: Linux

Registry is empty when i checked using "npm config get" command. I tried npm config set registry=http://registry.npmjs.org/ and it worked for me.

node: 6.3.1
npm: 4.2.0