when executing the index generates this error

when executing the index it generates this error I am working with entity framework 6

my web.config

<basicHttpBinding>
    <binding name="bsBinding" maxBufferPoolSize="214748647" maxBufferSize="214748647" maxReceivedMessageSize="214748647" />
  </basicHttpBinding>

my driver to generate my index is the following:

public class RRHH_MUNICIPIOController : Controller
{
    RRHH_MUNICIPIOClient db = new RRHH_MUNICIPIOClient();
    RRHH_DEPARTAMENTOClient dbDepto = new RRHH_DEPARTAMENTOClient();
    public RRHH_MUNICIPIOController()
    {
        mapa.Mapeo.CrearMapas();
    }
    // GET: RRHH_MUNICIPIO
    public ActionResult Index()
    {          
            IEnumerable<ent.RRHH_MUNICIPIO> listar = db.TraerTodo();
            IEnumerable<mod.RRHH_MUNICIPIOModel> entidad = Mapper.Map<IEnumerable<ent.RRHH_MUNICIPIO>, IEnumerable<mod.RRHH_MUNICIPIOModel>>(listar);
            return View(entidad);        

    }

my proxy is the following:

 [System.ServiceModel.OperationContractAttribute(Action="http://tempuri.org/IRRHH_MUNICIPIO/TraerTodo", ReplyAction="http://tempuri.org/IRRHH_MUNICIPIO/TraerTodoResponse")]
System.Collections.Generic.List<AplicacionEntidad.RRHH_MUNICIPIO> TraerTodo();