Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/RvoKYkv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-8d35159c-4591-4cda-bd03-3d872bd0e5a7",
      "cw-ea9fc59f-d413-4622-aad7-faa72000746e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-8299f05c-b7af-4e6b-b185-53727dca7c04",
    "manifestId": "https://dam.iuav.it/iuav/containers/RvoKYkv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ea9fc59f-d413-4622-aad7-faa72000746e"
  }
}