Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/rvG6X1Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-2544bd6c-7e11-4123-a9c7-e7489740dd29",
      "cw-e790a6bc-5021-4632-bc53-c0a44a17a14d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2eb4e74b-7dca-4369-9f27-a368a6038ece",
    "manifestId": "https://dam.iuav.it/iuav/containers/rvG6X1Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e790a6bc-5021-4632-bc53-c0a44a17a14d"
  }
}