Ionic 3 native deeplinking

I ran into that same problem just yesterday...

In my case, I didn't register my page everywhere that your supposed to in my app.module.

@NgModule({
  declarations: [
    MyPage
  ],
  imports: [
    IonicPageModule.forChild(MyPage)
  ],
  entryComponents: [
    MyPage
  ]
})
export class MyPageModule {}

For me I was missing the IonicPageModule.forChild reference. Here is the documentation page where it talks about setting a page up for deeplinking. https://ionicframework.com/docs/api/navigation/IonicPage/#usage

I know its too late but still, it can be helpful for someone. I am redirecting the user after subscribing so you can put more logic if the user is logged in on not or so you can change things accordingly

this.deeplinks.route({
  '/item/:itemId': {}
}).subscribe(match => { 
    console.log('Successfully matched route' + JSON.stringify(match));
    this.nav.push(Detail1Page, { issueId: match.$args.issueId});

  }
}, nomatch => {
  console.error('Got a deeplink that didn\'t match' + JSON.stringify(nomatch));
});