Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/kv4dDPv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c34cf95c-8fc0-453c-af6e-d7e56c0b7ced",
      "cw-e6b82191-cdd0-4a35-be16-ae1483be66f1"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2efd095f-17f8-43d8-8561-75933fd96bb1",
    "manifestId": "https://dam.iuav.it/iuav/containers/kv4dDPv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e6b82191-cdd0-4a35-be16-ae1483be66f1"
  }
}