Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/AkrJ4kv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-db9cabc9-ac05-445c-93d1-d209f71cb1c7",
      "cw-45d69d32-d140-49c4-8cd3-25551dc0cd2f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2fc57d5e-cbeb-4495-99c6-2ea42c1eecdd",
    "manifestId": "https://dam.iuav.it/iuav/containers/AkrJ4kv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-45d69d32-d140-49c4-8cd3-25551dc0cd2f"
  }
}