Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/vxB6Lxe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-e9f156fa-68c5-40e6-8dc6-3c43319f7b95",
      "cw-e59d1581-7b9d-4569-b2eb-9bfb45b2edb2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-762ec823-6df8-41f8-b338-dd0375ddd5e5",
    "manifestId": "https://dam.iuav.it/iuav/containers/vxB6Lxe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e59d1581-7b9d-4569-b2eb-9bfb45b2edb2"
  }
}