Failed at the ionic-hello-world@ watch script 'ionic-app-scripts watch'.

Note: for support questions, please use one of these channels:

https://forum.ionicframework.com/ http://ionicworldwide.herokuapp.com/

Note: for build related issues you can open up an issue on the ionic-app-scripts repo

https://github.com/driftyco/ionic-app-scripts

Short description of the problem:

Cannot type ionic serve without getting the following error

What behavior are you expecting?

Seeing my code run in a browser

Steps to reproduce:

1. Installed node 6
2. Installed ionic and cordova
3. Verified that repository works on other machines

ionic serve

Running 'serve:before' npm script before serve

> ionic-hello-world@ watch /Users/Tassos/Dropbox/Code/LittleBrother
> ionic-app-scripts watch

sh: ionic-app-scripts: command not found

npm ERR! Darwin 15.6.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "run" "watch" "--color"
npm ERR! node v6.9.1
npm ERR! npm  v3.10.8
npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn
npm ERR! ionic-hello-world@ watch: `ionic-app-scripts watch`
npm ERR! spawn ENOENT
npm ERR! 
npm ERR! Failed at the ionic-hello-world@ watch script 'ionic-app-scripts watch'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the ionic-hello-world package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     ionic-app-scripts watch
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs ionic-hello-world
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls ionic-hello-world
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/Tassos/Dropbox/Code/LittleBrother/npm-debug.log
Caught exception:
 undefined 

Mind letting us know? https://github.com/driftyco/ionic-cli/issues

Post the output of ionic info below please

ionic info
--------------------------------
--------------------------------

Your system information:

Cordova CLI: 6.3.1
Ionic CLI Version: 2.1.1
Ionic App Lib Version: 2.1.1
ios-deploy version: Not installed
ios-sim version: 5.0.8 
OS: Mac OS X El Capitan
Node Version: v6.9.1
Xcode version: Xcode 8.0 Build version 8A218a 


--------------------------------
******************************************************
 Dependency warning - for the CLI to run correctly,      
 it is highly recommended to install/upgrade the following:     

 Install ios-deploy to deploy iOS applications to devices.  `npm install -g ios-deploy` (may require sudo)

******************************************************

Other information: (e.g. stacktraces, related issues, suggestions how to fix, stackoverflow links, forum links, etc)

[tlambrou]

In my case it appears that the problem was related to having my ionic app running in a folder that was synced to cloud services (Dropbox, iCloud). After moving the directory to a non-synced folder, things began working again. # #

[DrSensor]

@tlambrou i solve this by adding ionic-app-scripts to the project npm install @ionic/app-scripts@latest --save-dev