Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/oA3LLle/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-7c8d2851-ae87-41e6-b67f-742a732f080f",
      "cw-9c846717-2eb6-4bb6-9f11-e2ad22f92e74"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1ff2c3eb-3bd4-478b-87ff-682de00b2afb",
    "manifestId": "https://dam.iuav.it/iuav/containers/oA3LLle/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9c846717-2eb6-4bb6-9f11-e2ad22f92e74"
  }
}