Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/be9NrVZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-478479c7-b35c-41db-8630-a127ffd102ce",
      "cw-16883890-a03f-42ad-bfe1-aac9e7f59ff3"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4bdd9f2e-a220-4e41-baeb-43a764aea5fc",
    "manifestId": "https://dam.iuav.it/iuav/containers/be9NrVZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-16883890-a03f-42ad-bfe1-aac9e7f59ff3"
  }
}