Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/vaX4MEZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d9e62f54-7a80-46e4-be4b-f6f40bc534ba",
      "cw-4174acba-d6a9-464e-8126-5a61d739705b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6b4f2bc0-242a-4b31-8b26-c798d46c6681",
    "manifestId": "https://dam.iuav.it/iuav/containers/vaX4MEZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-4174acba-d6a9-464e-8126-5a61d739705b"
  }
}