Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/2vRn9jv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3a3d8a9f-d3af-4e7c-9cf7-b2997c23c290",
      "cw-c57679d5-e9dc-46b9-ba17-c599765b3341"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6f991bed-2566-46cf-a55e-0ff17700bcb1",
    "manifestId": "https://dam.iuav.it/iuav/containers/2vRn9jv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c57679d5-e9dc-46b9-ba17-c599765b3341"
  }
}