terminal finds some errors when starting Maya

[sancio]

Tough Maya seems to work as usual, my terminal says there must be an error. I think I always had this error, but I can't figure out what kind of problem derives from that!

ProblemType: Bug
DistroRelease: elementary OS 0.2
Package: maya-calendar 0.2.0~r456-0+pkg20~precise1 [origin: LP-PPA-elementary-os-daily]
Uname: Linux 3.9.0-030900-generic i686
ApportVersion: 2.0.1-0ubuntu17.2+elementary3~precise1
Architecture: i386
CrashDB: maya_calendar
Date: Tue Jun 11 22:14:52 2013
ExecutablePath: /usr/bin/maya-calendar
GsettingsChanges:

InstallationMedia: elementary OS 0.2 "Luna" - Beta 2 i386 (20130506)
MarkForUpload: True
ProcEnviron:
 SHELL=/bin/bash
 TERM=xterm
 PATH=(custom, no user)
 LANG=it_IT.UTF-8
SourcePackage: maya-calendar
UpgradeStatus: No upgrade log present (probably fresh install)

[sancio (dipierro-giulio)]

$ maya-calendar
[_LOG_LEVEL_INFO 22:45:59.983954] Application.vala:77: Calendario version: 0.2
[_LOG_LEVEL_INFO 22:45:59.984282] Application.vala:79: Kernel version: 3.9.0-030900-generic
[_LOG_LEVEL_FATAL 22:46:00.258116] file /build/buildd/maya-calendar-0.2.0~r456/obj-i686-linux-gnu/Maya/View/Widgets/ContractorButtonWithMenu.c: line 188: unexpected error: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.elementary.contractor was not provided by any .service files (g-dbus-error-quark, 2)
[_LOG_LEVEL_FATAL 22:46:00.258330] Calendario will not function properly.
[_LOG_LEVEL_FATAL 22:46:00.258590] [GLib-GObject] g_object_ref_sink: assertion `G_IS_OBJECT (object)' failed
[_LOG_LEVEL_FATAL 22:46:00.258747] Calendario will not function properly.
[_LOG_LEVEL_FATAL 22:46:00.278247] [Gtk] gtk_toolbar_insert: assertion `GTK_IS_TOOL_ITEM (item)' failed
[_LOG_LEVEL_FATAL 22:46:00.278448] Calendario will not function properly.

this is what terminal says about it.