Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Znk1xNv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-fb47a23c-2386-472d-83a7-45417360e4c4",
      "cw-371e7171-0631-4d40-b964-439e62128c4e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-dcca2ccb-852a-4a78-a732-515724288ce1",
    "manifestId": "https://dam.iuav.it/iuav/containers/Znk1xNv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-371e7171-0631-4d40-b964-439e62128c4e"
  }
}