hello! i inject a map on my div called "concessionario-map" with GMap, a jquery plugin. Gmap

everything works fine until this morning. now the debugger says:

ReferenceError: Can't find variable: G_NORMAL_MAP

i just search on google and i read some similar situation, but i dont find a case like mine. please, can you help me? thanks a lot in advance :)

(full code)

    $.getJSON("http://maps.google.com/maps/geo?q="+loc+"&key=ABQIAAAAgDXoBEgIn38xaRBBqo6ygxTDjF32IQ1zA0BVcGSuGouGRvo0kRRKiyipbCniJWSso2scatdz36K-Mg&sensor=false&output=json&callback=?",function(data, textStatus)
    {
        long = data.Placemark[0].Point.coordinates[0];
        lat = data.Placemark[0].Point.coordinates[1];


    console.log(data);

    $('#concessionario-map').gMap(
    {
        scrollwheel: false,
        latitude: lat,
        longitude: long,
        zoom: 15,
        markers:
        [{
            latitude: lat,
            longitude: long
        }],
        icon:
        {
            image: "files/images/gmap_pin_orange.png",
            shadow: "files/images/gmap_pin_orange_shadow.png",
            iconsize: [26, 46],
            shadowsize: [28, 48],
            iconanchor: [12,46],
            infowindowanchor: [12, 0]
        }
    })
});