Help with Browser build NullInjectorError: No provider for Config!

Ionic Framework ionic-v3
1

I hope somebody can help me here.
Haven not been actively developing our Ionic 3 app for months now. I keep trying to convince my company to start over.
Here we are with trying to do a release.
Trying to push up a browser version of the code.
To help debug I’m doing just a

ionic cordova build browser --aot

Once it is pushed up to the server I can log in, but as it trying to transition over to the home page I get this is chrome console.

ERROR Error: Uncaught (in promise): Error: StaticInjectorError[Config]: 
  StaticInjectorError[Config]: 
    NullInjectorError: No provider for Config!
Error: StaticInjectorError[Config]: 
  StaticInjectorError[Config]: 
    NullInjectorError: No provider for Config!
    at _NullInjector.get (core.js:923:1)
    at resolveToken (core.js:1211:1)
    at tryResolveToken (core.js:1153:1)
    at StaticInjector.get (core.js:1024:1)
    at resolveToken (core.js:1211:1)
    at tryResolveToken (core.js:1153:1)
    at StaticInjector.get (core.js:1024:1)
    at resolveNgModuleDep (core.js:10584:1)
    at NgModuleRef_.get (core.js:11805:1)
    at resolveDep (core.js:12301:1)
    at c (polyfills.js:3:19752)
    at Object.reject (polyfills.js:3:19174)
    at NavControllerBase._fireError (nav-controller-base.js:223:1)
    at NavControllerBase._failed (nav-controller-base.js:216:1)
    at nav-controller-base.js:263:45
    at t.invoke (polyfills.js:3:14976)
    at Object.onInvoke (core.js:4626:1)
    at t.invoke (polyfills.js:3:14916)
    at r.run (polyfills.js:3:10143)
    at polyfills.js:3:20242

I have not done any major changes to this code. I don’t know what Config is.

Trying pretty much anything I can think of. I removed Ionic and Conrdova and just ran the install for it again. It looks like it installed Ionic 5 and Cordova 11.

Ionic:

   Ionic CLI          : 5.4.16 (C:\Users\W\AppData\Roaming\npm\node_modules\ionic)
   Ionic Framework    : ionic-angular 3.9.10
   @ionic/app-scripts : 3.2.4

Cordova:

   Cordova CLI       : 10.0.0 (cordova-lib@10.1.0)
   Cordova Platforms : android 10.0.1, browser 6.0.0
   Cordova Plugins   : cordova-plugin-ionic-webview 5.0.0, (and 13 other plugins)

Utility:

   cordova-res : not installed
   native-run  : not installed

System:

   NodeJS : v14.17.2 (C:\Program Files\nodejs\node.exe)
   npm    : 6.14.13
   OS     : Windows 10

This is the version I’m on. I removed browser platform and added it again and still get the same error above.

Any idea what would cause this?

2

Debugging I can see an event where after a succesful login to set a new root page in the NavController.

this.events.subscribe('login:isSuccess', function (data) {
            if (data) {
                _this.navCtrl.setRoot(landing_page);
            }
            _this.events.unsubscribe('login:isSuccess');
        });

I don’t know what is missing the config. It is either when the Root is set or the unsubscribe part.