Android Question RemoteServiceException error, where to look for ?

       at java.lang.Object.wait(Object.java)
       at java.lang.Thread.parkFor$(Thread.java:1220)
       at sun.misc.Unsafe.park(Unsafe.java:299)
       at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158)
       at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2013)
       at java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:510)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.performOperation(DependencyPriorityBlockingQueue.java:197)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.get(DependencyPriorityBlockingQueue.java:236)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:65)
       at io.fabric.sdk.android.services.concurrency.DependencyPriorityBlockingQueue.take(DependencyPriorityBlockingQueue.java:46)
       at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1036)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1098)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
       at java.lang.Thread.run(Thread.java:818)

Sub Process_Globals
    'These global variables will be declared once when the application starts.
    'These variables can be accessed from all modules.
    ...
    Public notif As Notification
    Private NotifIcon24 As Bitmap
    Private NotifIcon256 As Bitmap
    Private PlayIcon,PauseIcon,PrevIcon,NextIcon,ForwardIcon,RewindIcon As Bitmap
    Public IconeNotifPlay As Boolean
    ...
End Sub

Sub Service_Create
    ...
    ' Lecture des icones notif
    NotifIcon24 = LoadBitmap(File.DirAssets,"icon24.png")
    NotifIcon256 = LoadBitmap(File.DirAssets,"icon256.png")
    
    'PlayPauseIcon = LoadBitmap(File.DirAssets,"ico_playpause.png")
    PlayIcon = LoadBitmap(File.DirAssets,"ico_play.png")
    PauseIcon = LoadBitmap(File.DirAssets,"ico_pause.png")
    PrevIcon = LoadBitmap(File.DirAssets,"ico_prev.png")
    NextIcon = LoadBitmap(File.DirAssets,"ico_next.png")
    ForwardIcon = LoadBitmap(File.DirAssets,"ico_forward.png")
    RewindIcon = LoadBitmap(File.DirAssets,"ico_rewind.png")

    ConstruitNotif
    ...
    Service.AutomaticForegroundMode = Service.AUTOMATIC_FOREGROUND_NEVER
    ...
End Sub

Sub Service_Start (StartingIntent As Intent)
    Service.StartForeground(1,notif)
End Sub

public Sub ConstruitNotif
    ' Construction en fonction du contexte
    Private n As NB6
    Private LibNotif As String = ""
    n.Initialize("default", Application.LabelName,"DEFAULT")
    n.SmallIcon(NotifIcon24)
    n.LargeIcon(NotifIcon256)
    n.OldNotificationIcon("icon")   
    n.Visibility("PUBLIC")
    n.SetDefaults(False,False,False)
    n.OnlyAlertOnce(True)
    n.DeleteAction(Notifs,"ActionDelete")
    If Starter.Player.FichierActif Then
        n.AddButtonAction(PrevIcon,"|<", Notifs,"ActionPrev")
        n.AddButtonAction(RewindIcon,"<<", Notifs,"ActionRewind")
        If Starter.Player.IsPlaying Then
            n.AddButtonAction(PauseIcon,"||", Notifs,"ActionPlayPause")
            IconeNotifPlay = False
        Else
            n.AddButtonAction(PlayIcon,"|>", Notifs,"ActionPlayPause")
            IconeNotifPlay = True
        End If
        n.AddButtonAction(ForwardIcon,">>", Notifs,"ActionForward")
        n.AddButtonAction(NextIcon,">|", Notifs,"ActionNext")
        n.MediaStyle(5)
        LibNotif = Starter.Player.NomFichier
    Else
        ' Pas de lecture en cours
        LibNotif = c.string_Main_LibNotif
    End If
    LibNotif = c.string_Main_LibNotif
    notif = n.Build(LibNotif,"","tag",Main)
End Sub

' This sub is called many times to update notif bar accordinf to context
public Sub MajNotificationBar
    ' Construction en fonction du contexte
    ConstruitNotif
    ' Affichage
    notif.Notify(1)
End Sub