Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Z81Oo2v/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-bee1e30f-3e1e-4c82-a694-9c37454921b3",
      "cw-e0d52a82-d0f0-4b41-9233-3eeadcbb740b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1d18066c-57bb-48b0-9959-465b3612ea71",
    "manifestId": "https://dam.iuav.it/iuav/containers/Z81Oo2v/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e0d52a82-d0f0-4b41-9233-3eeadcbb740b"
  }
}