Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ArPDPrZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5cdf9528-fdb0-4bcb-9039-8fc8a6b5a5d1",
      "cw-2ed9573f-aafd-45fb-bde3-2c8c6ed1d4a8"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-02768a17-a875-46dd-8205-e7d87cca6aed",
    "manifestId": "https://dam.iuav.it/iuav/containers/ArPDPrZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2ed9573f-aafd-45fb-bde3-2c8c6ed1d4a8"
  }
}