Livereload problem

I’m new with Ionic, I have a problem with the lab livereload, it doesn’t work and in chrome console this error is showed:

VM54:164 WebSocket connection to ‘ws://localhost:35729/livereload’ failed: Error in connection establishment: net::ERR_CONNECTION_REFUSED…

Does anyone have a solution?

I think, i forget to add this:

cli packages: (C:\Users\giacomo\AppData\Roaming\npm\node_modules)

@ionic/cli-utils  : 1.12.0
ionic (Ionic CLI) : 3.12.0

global packages:

cordova (Cordova CLI) : not installed

local packages:

@ionic/app-scripts : 3.0.0
Cordova Platforms  : android 6.2.3
Ionic Framework    : ionic-angular 3.7.1


Android SDK Tools : 25.3.1
Node              : v6.11.3
npm               : 5.4.2
OS                : Windows 10


backend : pro

Any solutions? Same problem here.

I remove ws folder from node_modules. After that, I execute npm install --save ws and version 3.3.3 was installed. Last release is 4.0.0, but with 3.3.3 my problem was fixed.