Npm is not working,eventhough it shows version

Question

I installed node on my computer without any problem.But every time i try to use npm it throws this same error.I tried different node modules and packages,still throws the same error. node -v v9.8.0 npm -v v6.1.0

npm install polymer-cli -g npm ERR! code E404 npm ERR! 404 Not Found: polymer-cli@latest

I tried uninstalling node too.

Answer 1

This might work for you:

npm up npm -g 
npm install -g polymer-cli