Ionic build halts without any error

I am a newbie using Ionic. A previous developer developed an Ionic v3 project which I am taking further. I am trying to build the project but it stops its execution without any errors. Below is my Ionic info :

global packages:

Cordova CLI : 8.0.0

local packages:

@ionic/app-scripts : 3.1.0
Cordova Platforms  : android 8.0.0 browser 5.0.4
Ionic Framework    : ionic-angular 3.9.2


Node : v8.9.1
npm  : 5.5.1
OS   : Windows 10

And here is where the execution stops

Please let me know in case any other info is needed from my end. I have been already stuck with this issue since 3 days now. Have no clue how to solve this. Any help is appreciated. Thanks.

Odd that it doesn’t give an error.
Possibly start with: ionic repair
Just an idea.