Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Jvalb5Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-8c6bb3bf-eb8c-47e6-a91f-e86805dacab8",
      "cw-e82def7f-94ef-4d41-be57-5733e1da1062"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-48efeba8-4e68-4ea0-b87d-fcd7f01dafe8",
    "manifestId": "https://dam.iuav.it/iuav/containers/Jvalb5Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e82def7f-94ef-4d41-be57-5733e1da1062"
  }
}