Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/QvPnQze/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-219303c3-737d-4fcb-b105-a7db273a3295",
      "cw-01b95b46-c92d-461d-86d1-3e33ae6dd096"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-f39451dd-742d-42e7-9a4a-ae2827c54e21",
    "manifestId": "https://dam.iuav.it/iuav/containers/QvPnQze/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-01b95b46-c92d-461d-86d1-3e33ae6dd096"
  }
}