Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/nv7ka0v/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-38c80fdc-5e05-4b93-b694-254397d75704",
      "cw-d4324e1d-d4c8-4fe8-a262-bf5df8d9dfc7"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-d1db2318-eecf-4f6a-af53-46e5f265e2f8",
    "manifestId": "https://dam.iuav.it/iuav/containers/nv7ka0v/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d4324e1d-d4c8-4fe8-a262-bf5df8d9dfc7"
  }
}