Meteor Tutorial - Tracker is not defined

I'm following the tutorial of Meteor with Ionic and although I've been solving some bug that has got stuck in one in particular I do not know where to put a hand. In particular it has been to modify the main.ts with this code

import 'meteor-client';

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { MeteorObservable } from 'meteor-rxjs'; import { Meteor } from 'meteor/meteor'; import { AppModule } from './app.module';

Meteor.startup(() => {   const subscription = MeteorObservable.autorun().subscribe(() => {

    if (Meteor.loggingIn()) {
      return;
    }

    setTimeout(() => subscription.unsubscribe());
    platformBrowserDynamic().bootstrapModule(AppModule);   }); });

The error that throws me is the following

  

ReferenceError: Tracker is not defined       at autorun ( link )       at Observable._subscribe ( link )       at Observable._trySubscribe ( link )       at Observable.subscribe ( link )       at link       at maybeReady ( link )       at HTMLDocument.loadingCompleted ( link )       at t.invokeTask ( link )       at r.runTask ( link )       at e.invokeTask [as invoke] ( link )

In principle I do not think I need any more dependency since I do not see that I ask for anything either.