Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/7Az0EXZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a88178f0-e928-4c7c-8d4b-5f1fd3ec6a4e",
      "cw-b08874db-3fa1-426a-98b7-1d4624d27bf3"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-f8ca918e-f727-4c55-ba60-e936b2e52f8e",
    "manifestId": "https://dam.iuav.it/iuav/containers/7Az0EXZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b08874db-3fa1-426a-98b7-1d4624d27bf3"
  }
}