How to resolve app script error

Ionic Framework ionic-v3
1

I got error when i run below command
D:\kdIonic\ejohri>ionic cordova build android --prod
[INFO] Running app-scripts build: --prod --platform android --target cordova

[11:10:07] build prod started …
[11:10:08] clean started …
[11:10:08] clean finished in 1 ms
[11:10:08] copy started …
[11:10:08] ngc started …
[11:10:25] ngc finished in 17.80 s
[11:10:25] preprocess started …
[11:10:25] deeplinks started …
Error: The RegExp to find the DeepLinkConfigToken did not return valid data
at BuildError.Error (native)
at new BuildError (D:\kdIonic\ejohri\node_modules@ionic\app-scripts\dist\ut
il\errors.js:16:28)
at D:\kdIonic\ejohri\node_modules@ionic\app-scripts\dist\preprocess.js:18:2
1

My Ionic info is like this

D:\kdIonic\ejohri>ionic info

cli packages: (D:\kdIonic\ejohri\node_modules)

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

global packages:

cordova (Cordova CLI) : 7.0.1

local packages:

@ionic/app-scripts : 2.1.4
Cordova Platforms  : android 6.2.3
Ionic Framework    : ionic-angular 3.6.1

System:

Android SDK Tools : 26.1.1
Node              : v6.10.3
npm               : 5.4.2
OS                : Windows 7

Misc:

backend : legacy
2

Please don’t reply to this issue because it is solved

3

Provide the solution for this issue then?
So other people can watch how this is been fixed if they are facing the same problem.

4

First update the app-scripts to latest version (my app-scripts version is 3.0.0)
You can also change the version in package.json and then run npm install.