Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/vxB422e/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-57683c0d-8da0-4e9c-ad52-d3c3754402ad",
      "cw-6a05b7c6-1efa-4cb9-8e7f-f8eff2558de7"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ae0241dd-663d-4d75-8a0f-75244e1c89af",
    "manifestId": "https://dam.iuav.it/iuav/containers/vxB422e/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6a05b7c6-1efa-4cb9-8e7f-f8eff2558de7"
  }
}