Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/be9NrVZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a18e187a-6a59-4b42-b441-2089b7aa0de4",
      "cw-8ae738c8-4671-44bb-a8d9-6a01690c1660"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-f53fa6a5-ca25-4631-8ceb-3af143091d5d",
    "manifestId": "https://dam.iuav.it/iuav/containers/be9NrVZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-8ae738c8-4671-44bb-a8d9-6a01690c1660"
  }
}