error when i start npm

[aymenHarbaoui]

I get this error below when i start my server npm. Any help ?

ERROR in (webpack)-dev-server/client?http://localhost:8000
Module not found: Error: Can't resolve 'strip-ansi' in 'C:\Angular2\angularSeed\angular2-seed\node_modules\webpack-dev-server\client'
@ (webpack)-dev-server/client?http://localhost:8000 3:16-37
@ multi main

ERROR in (webpack)-dev-server/client/socket.js
Module not found: Error: Can't resolve 'sockjs-client' in 'C:\Angular2\angularSeed\angular2-seed\node_modules\webpack-dev-server\client'
@ (webpack)-dev-server/client/socket.js 1:13-37
@ (webpack)-dev-server/client?http://localhost:8000
@ multi main
webpack: bundle is now VALID.

[peturh]

Are you sure your using the correct node version? I got the same when I was using Node 4.x

[aymenHarbaoui]

i have npm@2.15.8 version and node 4.x

[peturh]

Then there is your problem.

From README.md:

Make sure you have node.js installed version 5+

[aymenHarbaoui]

Okay thank you ! because i used npm in different project ( as cordova mobile) so i think as you said this my probleme. Thank you very much