Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Z81OR2v/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0c927647-9c3b-4ac6-9d17-93bb6219755a",
      "cw-4c3095bb-6d49-40ae-aac3-ed0197768c7d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6a3103e2-6ca6-4b0e-a74c-debbd8b453ae",
    "manifestId": "https://dam.iuav.it/iuav/containers/Z81OR2v/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-4c3095bb-6d49-40ae-aac3-ed0197768c7d"
  }
}