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-c0ab63bf-7491-4b19-9b43-352556053348",
      "cw-e6bc9a9c-2dde-4e8b-b12a-763db496bbde"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-09a4d08d-a601-4cda-8bc7-a6ec30db2aeb",
    "manifestId": "https://dam.iuav.it/iuav/containers/Z81Oo2v/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e6bc9a9c-2dde-4e8b-b12a-763db496bbde"
  }
}