Can't run clean ionic2 project

Can’t run ionic v2 project. It is stuck on:

ionic-app-scripts serve “–v2” “–address” “” “–port” “8100” “–livereload-port” “35729”

I was able to create projects last week. now it stopped working. My colleague has the same problem

Problem is on Ubuntu 16.04

Please share the output of ionic info.

Your system information:

Cordova CLI: 6.5.0
Ionic Framework Version: 2.3.0
Ionic CLI Version: 2.2.1
Ionic App Lib Version: 2.2.0
Ionic App Scripts Version: 1.2.2
ios-deploy version: Not installed
ios-sim version: Not installed
OS: Linux 4.4
Node Version: v4.2.6
Xcode version: Not installed

Your Node is old and probably not compatible. Update to the current LTS and try again.

nodejs is already the newest version (4.2.6~dfsg-1ubuntu4.1)

Latest node LTS is v6.10.1