Getting error while installing Protractor

[Harish Dhage]

Hi,

I am getting error while installing protractor through npm.

npm ERR! Windows_NT 6.1.7601

npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Users\\hdhage\\AppData\\Roaming\\npm\\node_modules\\npm\\bin\\npm-cli.js" "install" "-g" "protractor"

npm ERR! node v8.11.3

npm ERR! npm  v4.1.2

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!     C:\Users\hdhage\npm-debug.log

Thanks,

Harish