Hi get this following message by starting up youtranslate 64 amd machine

Exception in Gtk# callback delegate
Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.DllNotFoundException: gdk-x11-2.0
at (wrapper managed-to-native) TrayIcon:gdk_x11_display_get_xdisplay (intptr)
at TrayIcon.OnRealized () [0x00000]
at Gtk.Widget.realized_cb (IntPtr widget) [0x00000]
at GLib.ExceptionManager.RaiseUnhandledException(Syst em.Exception e, Boolean is_terminal)
at Gtk.Widget.realized_cb(IntPtr widget)
at Gtk.Widget.gtk_widget_show_all(IntPtr )
at Gtk.Widget.ShowAll()
at YTTrayIcon..ctor(Gtk.Window mwin, .ytApp y)
at ytApp.setupGUI()
at ytApp..ctor(System.String[] args)
at ytApp.Main(System.String[] args)
What is going on and what can I do to repair this btw it never runs

thanks

Johan