failed to connecting to org.xfce.Dict

Im getting this error (xsession errors):

** (xfce4-dict:2439): WARNING **: 11:23:42.675: failed to connecting to org.xfce.Dict, reason was: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name is not activatable

although the dictionary seems to work fine.