Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/rvGDzEA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-178158d6-4252-438e-b865-db5c4d180e37",
      "cw-65286eaf-c7ec-4c8a-ae49-d0bafe11250c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-74b45b52-e36a-4eb0-a237-8140da587428",
    "manifestId": "https://dam.iuav.it/iuav/containers/rvGDzEA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-65286eaf-c7ec-4c8a-ae49-d0bafe11250c"
  }
}