System.NullReferenceException at start Xamarin Droid App - xamarin

Question

I am developing an application with MVVM Cross, Mvvm Cross Forms, Xamarin Forms and Grail KIT. In IOS it works perfectly. But when I start it on Android I get an error without trace and I do not know how to solve it.
After the OnStart method is executed. This exception occurs:
The step-by-step execution of the debugger does not allow me to go beyond this method.
This is the code of the MvxFormsApplication.
public partial class App : MvxFormsApplication
{
private void ConfigLocale()
{
if (Device.RuntimePlatform == Device.iOS || Device.RuntimePlatform == Device.Android )
{
Debug.WriteLine("Get Culture Info ...");
var ci = DependencyService.Get<ILocalize>().GetCurrentCultureInfo();
Debug.WriteLine(ci.ToString());
AppResources.Culture = ci; // set the RESX for resource localization
DependencyService.Get<ILocalize>().SetLocale(ci); // set the Thread for locale-aware methods
}
}
public App()
{
ConfigLocale();
InitializeComponent();
}
void OnAuthenticatedUserMessage(AuthenticatedUserMessage authenticatedUserMessage)
{
Debug.WriteLine("OnAuthenticatedUserMessage ...");
var deviceGroupsService = Mvx.Resolve<IDeviceGroupsService>();
// save token
deviceGroupsService.saveDevice(CrossDeviceInfo.Current.Id, Settings.FcmToken).Subscribe(device => {
Debug.WriteLine(String.Format("Device Saved: {0}", device.ToString()));
});
}
void OnExceptionOcurredMessage(ExceptionOcurredMessage exceptionOcurredMessage)
{
Debug.WriteLine("OnExceptionOcurredMessage ...");
var userDialogs = Mvx.Resolve<IUserDialogs>();
userDialogs.ShowError(AppResources.Global_ErrorOcurred);
if (exceptionOcurredMessage.Ex != null)
exceptionOcurredMessage.Ex.Track();
}
protected override void OnStart()
{
Debug.WriteLine("Forms App OnStart ...");
var messenger = Mvx.Resolve<IMvxMessenger>();
// subscribe to Authenticated User Message
messenger.Subscribe<AuthenticatedUserMessage>(OnAuthenticatedUserMessage);
// subscribe to Exception Ocurred Message
messenger.Subscribe<ExceptionOcurredMessage>(OnExceptionOcurredMessage);
//Handling FCM Token
CrossFirebasePushNotification.Current.OnTokenRefresh += (s, p) =>
{
Debug.WriteLine($"TOKEN REC: {p.Token}");
Settings.FcmToken = p.Token;
};
Debug.WriteLine($"TOKEN: {CrossFirebasePushNotification.Current.Token}");
Settings.FcmToken = CrossFirebasePushNotification.Current.Token;
}
}
}
The application starts with a SplashScreen that I expose below:
using System;
using Android.App;
using Android.Content.PM;
using MvvmCross.Droid.Views;
using MvvmCross.Forms.Droid;
using Xamarin.Forms;
namespace Bullytect.Droid
{
[Activity(
Name = "com.usal.bisite.bulltect.SplashScreen",
Label = "Bulltect"
, MainLauncher = true
, Icon = "#mipmap/ic_launcher"
, Theme = "#style/Theme.Splash"
, NoHistory = true
, ScreenOrientation = ScreenOrientation.Portrait)]
public class SplashScreen : MvxSplashScreenActivity
{
public override void InitializationComplete()
{
StartActivity(typeof(MvxFormsApplicationActivity));
}
protected override void OnCreate(Android.OS.Bundle bundle)
{
Forms.Init(this, bundle);
// Leverage controls' StyleId attrib. to Xamarin.UITest
Forms.ViewInitialized += (object sender, ViewInitializedEventArgs e) => {
if (!string.IsNullOrWhiteSpace(e.View.StyleId))
{
e.NativeView.ContentDescription = e.View.StyleId;
}
};
base.OnCreate(bundle);
}
}
}
The Activity MvxFormsApplicationActivity is then executed by the Application Application
namespace Bullytect.Droid
{
[Activity(
Name = "com.usal.bisite.bulltect.MvxFormsApplicationActivity",
Label = "bulltect",
Icon = "#mipmap/ic_launcher",
Theme = "#style/AppTheme",
MainLauncher = false,
LaunchMode = LaunchMode.SingleTask,
ScreenOrientation = ScreenOrientation.Portrait
)]
public class MvxFormsApplicationActivity : FormsAppCompatActivity
{
protected override void OnCreate(Bundle bundle)
{
try
{
ToolbarResource = Resource.Layout.Toolbar;
TabLayoutResource = Resource.Layout.Tabs;
base.OnCreate(bundle);
Forms.Init(this, bundle);
PullToRefreshLayoutRenderer.Init();
XFGloss.Droid.Library.Init(this, bundle);
//Initializing FFImageLoading
CachedImageRenderer.Init();
UserDialogs.Init(this);
GrialKit.Init(this, "Bullytect.Droid.GrialLicense");
FormsHelper.ForceLoadingAssemblyContainingType(typeof(UXDivers.Effects.Effects));
var formsPresenter = (MvxFormsPagePresenter)Mvx.Resolve<IMvxAndroidViewPresenter>();
LoadApplication(formsPresenter.FormsApplication);
//FirebasePushNotificationManager.ProcessIntent(Intent);
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("**BullTect LAUNCH EXCEPTION**\n\n" + e);
}
}
public override void OnConfigurationChanged(Android.Content.Res.Configuration newConfig)
{
base.OnConfigurationChanged(newConfig);
DeviceOrientationLocator.NotifyOrientationChanged();
}
}
}
These are all the packages I have installed:
Hope someone can help me.