Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/nZbbPRZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0322c4bc-e436-470f-aa53-1983da0bd4cd",
      "cw-79a5ed9b-859a-482c-a70e-d7f8e2d49a96"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2146df52-595f-4338-95a5-2a76a7e54313",
    "manifestId": "https://dam.iuav.it/iuav/containers/nZbbPRZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-79a5ed9b-859a-482c-a70e-d7f8e2d49a96"
  }
}