Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/QvPgkXZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f31bf1e7-afdf-45e9-bfe1-d9402fac0347",
      "cw-f73d5607-607b-46b7-9075-58f0abbb122d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-84d6bc82-9237-4da7-8313-eb006dd089b3",
    "manifestId": "https://dam.iuav.it/iuav/containers/QvPgkXZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f73d5607-607b-46b7-9075-58f0abbb122d"
  }
}