Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/9ZN5N1e/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-53313603-82a5-448e-a649-3d12f79ce014",
      "cw-cec99159-069b-466e-950c-12fbd1a8d8c4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6156287b-6abb-4cf1-a1d5-a9160d6c47b5",
    "manifestId": "https://dam.iuav.it/iuav/containers/9ZN5N1e/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-cec99159-069b-466e-950c-12fbd1a8d8c4"
  }
}