Ionic 4 Facebook Login Android

I followed this tutorial step by step https://ionicthemes.com/tutorials/about/ionic-facebook-login

The issue I’m having is that after the login, my app is not redirecting to the page I need it to. No error on the console when testing this on an emulated Pixel 2 device running Android 9 . Here’s the code for handling the authentication:

const permissions = ['public_profile', 'email'];

    await this.facebook.login(permissions).then(response => {
        const userId = response.authResponse.userID;
        this.uid = userId;
        this.facebook.api('/me?fields=name,email', permissions)
        .then(user => {
        user.picture = 'https://graph.facebook.com/' + userId + '/picture?type=large';
        const email = user.email;
        this.dataService.getUser(this.uid).subscribe((data) => {
          if (data.data() !== undefined) {
            this.user = data.data();
            this.deviceStorage.set('user', JSON.stringify(data.data()));
            this.deviceStorage.set('uid', this.uid);
            this.dataService.userNewListener(this.uid);
            if (data.data().isNew) {
              this.zone.run(() => {
                this.router.navigate(['/profile']);
              });
              this.toastService.showToast('Please set up your profile first.');
            } else {
              this.zone.run(() => {
                this.router.navigate(['/home']);
              });
              this.toastService.showToast('User has signed in successfully.');
            }
          } else {
            this.dataService.addUser(this.uid, {email, uid: this.uid, isNew: true, isFb: true}).then(() => {
              const obj =  {email, uid: this.uid, isNew: true, isFb: true};
              this.deviceStorage.set('uid', this.uid);
              this.deviceStorage.set('user', JSON.stringify(obj));
              this.toastService.showToast('Please set up your profile first.');
              this.zone.run(() => {
                this.router.navigate(['/profile']);
              });
            }).catch((err) => { console.log('facebookNerror 3 :' + err); });
          }
        });
        }).catch((err) => { console.log('facebookNerror 2 :' + err); });
      }, error => {
      console.log(error);
    }).catch((err) => {
      console.log('facebookNerror 1 :' + err);
      this.toastService.showToast('Native facebook error:');
      this.toastService.showToast('Native facebook error:' + err);
    });