Any API call returns status code 0

@kristofberge wrote:

I’m new to Ionic and will be working on a legacy Android project. As far as I know, I installed everything I need on my machine. I can run the app, when I want to do an API call, it always returns an empty object with status 0. It doesn’t matter which API I use or which http verb. Also, on my colleague’s machine, the same code with the same API works perfectly. Here’s my code:

let options = new RequestOptions({ headers: new Headers({ 'Access-Control-Allow-Origin': '*' }), withCredentials: false});

      this.http.get('http://dummy.restapiexample.com/api/v1/employees', options2).subscribe(

        data => {

        debugger;

        var test = data;

      },

      err => {

        debugger;

        var test = err;

      });

As you can see I’m calling a dummy API and I’m setting the Access-Control-Allow-Origin header. This should simply return a json array, but instead it always falls into the err handler with a status code of 0. Is there something I´m missing? What can I do here, I’m out of options.
Thank you.

PS: here´s my ionic info:

Ionic:

   Ionic CLI          : 5.4.16 (C:\Users\Kristof\AppData\Roaming\npm\node_modules\ionic)
   Ionic Framework    : ionic-angular 3.9.2
   @ionic/app-scripts : 3.2.4

Cordova:

   Cordova CLI       : 8.1.1 (cordova-lib@8.1.0)
   Cordova Platforms : android 7.1.4
   Cordova Plugins   : cordova-plugin-ionic-keyboard 2.0.5, cordova-plugin-ionic-webview 1.2.1, (and 14 other plugins)

Utility:

   cordova-res : not installed
   native-run  : 1.0.0

System:

   Android SDK Tools : 26.1.1 (C:\Users\Kristof\AppData\Local\Android\SDK)
   NodeJS            : v12.16.3 (C:\Program Files\nodejs\node.exe)
   npm               : 6.14.4
   OS                : Windows 10

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