Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/v68VN1e/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-97c8a2fb-c6f2-4bf2-bbd3-513bf2a31288",
      "cw-e339c4fd-c2d8-4850-8dc3-4b24fe235e30"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1d9e630f-8d06-4018-87e1-6d672e47a4cb",
    "manifestId": "https://dam.iuav.it/iuav/containers/v68VN1e/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e339c4fd-c2d8-4850-8dc3-4b24fe235e30"
  }
}