autodesk forge,加載圖形顯示黑色

加載模型,容器變黑色了.
一開始以為是我的程序的問題.但是用例子的代碼試了一下,也一樣.
是服務(wù)端出問題了嗎?
下面是例子的源碼.以前是可以的.現(xiàn)在不行了.
<!DOCTYPE html>
<html>
<head>

<meta charset="UTF-8">
<script src="https://developer.api.autodesk.com/viewingservice/v1/viewers/three.min.css"></script>
<link rel="stylesheet"  />
<script src="https://developer.api.autodesk.com/viewingservice/v1/viewers/viewer3D.min.js"></script>

</head>
<body onload="initialize()">
<div id="viewer" style="position:absolute; width:90%; height:90%;"></div>
<script>

function authMe () { return ('eyJhbGciOiJIUzI1NiIsImtpZCI6Imp3dF9zeW1tZXRyaWNfa2V5In0.eyJjbGllbnRfaWQiOiJIalFGcGpyU0JIM3EyMkJETVZGUGdZYjdzVkFZRmFiSiIsImV4cCI6MTUyMDI1OTMzNywic2NvcGUiOlsiZGF0YTpyZWFkIiwiZGF0YTp3cml0ZSIsImJ1Y2tldDpjcmVhdGUiLCJidWNrZXQ6cmVhZCJdLCJhdWQiOiJodHRwczovL2F1dG9kZXNrLmNvbS9hdWQvand0ZXhwNjAiLCJqdGkiOiJhc294RjJQU3Q3VGVORkh1TXVDWWV3b052cnFpRWU5VjREbkxCZUhFeVZDcnJSWnZ3V1FwbW83M0tDYzM1NzBEIn0.0mkXxMhJ-JRYjD7qjLcM3IOinShEV-kqLJMzQhvDVzA') ; }

function initialize () {
    var options ={
        'document' : "urn:dXJuOmFkc2sub2JqZWN0czpvcy5vYmplY3Q6Zm9yZ2UtY3NoYXJwLXNhbXBsZS1hcHAtaGpxZnBqcnNiaDNxMjJiZG12ZnBneWI3c3ZheWZhYmovbXktZWxlcGhhbnQub2Jq",
        'env': 'AutodeskProduction',
        'getAccessToken': authMe
    } ;
    var viewerElement =document.getElementById ('viewer') ;
    //var viewer =new Autodesk.Viewing.Viewer3D (viewerElement, {}) ; / No toolbar
    var viewer =new Autodesk.Viewing.Private.GuiViewer3D (viewerElement, {}) ; // With toolbar
    Autodesk.Viewing.Initializer (options, function () {
        viewer.initialize () ;
        loadDocument (viewer, options.document) ;
    }) ;
}
function loadDocument (viewer, documentId) {
    // Find the first 3d geometry and load that.
    Autodesk.Viewing.Document.load (
        documentId,
        function (doc) { // onLoadCallback
            var geometryItems =[] ;
            geometryItems =Autodesk.Viewing.Document.getSubItemsWithProperties (
                doc.getRootItem (),
                { 'type' : 'geometry', 'role' : '3d' },
                true
            ) ;
            if ( geometryItems.length <= 0 ) {
                geometryItems =Autodesk.Viewing.Document.getSubItemsWithProperties (
                    doc.getRootItem (),
                    { 'type': 'geometry', 'role': '2d' },
                    true
                ) ;
            }
            if ( geometryItems.length > 0 )
                viewer.load (
                    doc.getViewablePath (geometryItems [0])//,
                    //null, null, null,
                    //doc.acmSessionId /*session for DM*/
                ) ;
        },
        function (errorMsg) { // onErrorCallback
            alert("Load Error: " + errorMsg) ;
        }//,
        //{
        //    'oauth2AccessToken': authMe (),
        //    'x-ads-acm-namespace': 'WIPDM',
        //    'x-ads-acm-check-groups': 'true',
        //}
    ) ;
}

</script>
</body>
</html>

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