Error: app-scripts serve unexpectedly failed

[Aaron-Sterling]

Cross-posting an issue I put on app-scripts yesterday in case you guys are a different team.
ionic-app-scripts issue #975

Problem arose on both existing and new projects. I'm using nvm-for-windows, in case that has any effect. package,json, tsconfig.json and ionic info are at the crosspost. Ionic serve would bring up the homepage of the app, then crash, with this error:
[DEBUG] !!! ERROR ENCOUNTERED !!!
Error: app-scripts serve unexpectedly failed.
[DEBUG] Error: app-scripts serve unexpectedly failed.
at Object. (C:\Users\Aaron\IonicDevelop\ActionSearch\node_modules@ionic\cli-plugin-ionic-angular\dist\serve.js:50:19)
at Generator.next ()
at fulfilled (C:\Users\Aaron\IonicDevelop\ActionSearch\node_modules@ionic\cli-plugin-ionic-angular\dist\serve.js:4:58)

Thanks very much.

[tnovau]

I had the same issue, please i need a solution.

ionic info

global packages:

@ionic/cli-utils : 1.0.0
Cordova CLI      : 7.0.0
Ionic CLI        : 3.0.0

local packages:

@ionic/app-scripts              : 1.3.7
@ionic/cli-plugin-cordova       : 1.0.0
@ionic/cli-plugin-ionic-angular : 1.0.0
Ionic Framework                 : ionic-angular 3.2.0

System:

Node       : v7.10.0
OS         : Windows 10
Xcode      : not installed
ios-deploy : not installed
ios-sim    : not installed

Error: app-scripts serve unexpectedly failed.

[DEBUG] !!! ERROR ENCOUNTERED !!!
Error: app-scripts serve unexpectedly failed.
[DEBUG] Error: app-scripts serve unexpectedly failed.
at Object. (C:\Users\tnovau\client\node_modules@ionic\cli-plugin-ionic-angular\dist\serve.js:50:19)
at Generator.next ()
at fulfilled (C:\Users\tnovau\client\node_modules@ionic\cli-plugin-ionic-angular\dist\serve.js:4:58)

[imhoffd]

@Aaron-Sterling @tnovau Does this happen with app-scripts 1.3.6?

[tnovau]

1.3.7 is the version i have.

[imhoffd]

Can you try with 1.3.6?

npm install --save-dev @ionic/app-scripts@1.3.6

[tnovau]

I run npm instal --save-dev @ionic/app-scripts@1.3.6,and then when i run ionic serve, I get this message after [15:29:50] dev server running: http://localhost:8100/:

[DEBUG] !!! ERROR ENCOUNTERED !!!
Error: app-scripts serve unexpectedly failed.
[DEBUG] Error: app-scripts serve unexpectedly failed.
at Object. (C:\Users\tnovau\Documents\proyectos\ionic3project\ADX\client\node_modules@ionic\cli-plugin-ionic-angular\dist\serve.js:50:19)
at Generator.next ()
at fulfilled (C:\Users\tnovau\Documents\proyectos\ionic3project\ADX\client\node_modules@ionic\cli-plugin-ionic-angular\dist\serve.js:4:58)

[Aaron-Sterling]

@dwieeb I created a new project (blank), put in my source code folder from my main project, and started adding libraries until I encountered the error. I hit the error at the same point with both 1.3.6 and 1.3.7. Libraries in order of addition were:

npm install @angular/animations
npm install @ngrx/core @ngrx/store --save
ionic cordova plugin add cordova-plugin-inappbrowser@latest
npm install --save @ionic-native/in-app-browser
ionic cordova plugin add call-number
npm install --save @ionic-native/call-number
npm install angularfire2 firebase --save
npm install immutable --save

After installing immutable, I got the error. Up until that point, I had run ionic serve after every install, and it was fine, in both 1.3.6 and 1.3.7.

[quentinchap]

I made the same action than @Aaron-Sterling and on my side i had an error after this installation of angular/animation

[aditya27dev]

I had this issue when i executed command: ionic cordova run android --livereload -c -s. If you are doing the same, just try to run ionic cordova run platform.

I hope this will solve your issue,

[JulioCesarCeron]

I had the same error message

Error: app-scripts serve unexpectedly failed.

when i executed ionic serve

so i tried to run npm install -g ionic, and the problem is solved.