Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/nZbNqxZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-bef3dc2c-6fbf-4058-9d69-d5a88026899d",
      "cw-d66bd390-06aa-46d4-a86d-712d88658082"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e70081ef-fdbe-46ee-9ccf-16d24dad4a7d",
    "manifestId": "https://dam.iuav.it/iuav/containers/nZbNqxZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d66bd390-06aa-46d4-a86d-712d88658082"
  }
}