Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Az5RjXv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4389a8f4-5823-4e1b-b27f-e5c6cde12f96",
      "cw-81db9b79-a513-4a32-aad8-4bd6acdc7b7b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-84579d24-2bae-41e5-adcc-7f0a00bf9cda",
    "manifestId": "https://dam.iuav.it/iuav/containers/Az5RjXv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-81db9b79-a513-4a32-aad8-4bd6acdc7b7b"
  }
}