Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZYz4rYv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-fb95a568-0d04-411f-8223-a4391c7738ca",
      "cw-b0d7ecdd-4f2a-4de0-83de-52c4f0bbad15"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ee4f77fc-8f84-4f68-9d98-b569dbffa0c0",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZYz4rYv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b0d7ecdd-4f2a-4de0-83de-52c4f0bbad15"
  }
}