Waiting for Ionic connectivity with ionic-app-scripts issue

The reason is in that the app starts with 0.0.0.0 IP address. Try to add in our command "--address localhost" part. So

ionic serve --address localhost

Try the modified part. And try executing "npm start" command

 {
  "name": "name",
  "version": "0.0.1",
  "author": "Ionic Framework",
  "homepage": "http://ionicframework.com/",
  "private": true,
  "scripts": {
    "clean": "ionic-app-scripts clean",
    "build": "ionic-app-scripts build --aot --minifyjs --minifycss --release",
    "lint": "ionic-app-scripts lint",
    "ionic:build": "ionic-app-scripts build",
    "start": "ionic-app-scripts serve"  //instead of ionic:serve, write start
  },

If none of these works, then make sure your FIREWALL is OFF. (into antivirus software as well.)