Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/kv4JLXe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-01019bc6-fae4-4a11-ad76-16dc9a73e56c",
      "cw-28944f42-83a7-46eb-8bd4-7b4ffb1d3a4a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-41c259b8-5625-4127-9b21-3a529d7d1771",
    "manifestId": "https://dam.iuav.it/iuav/containers/kv4JLXe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-28944f42-83a7-46eb-8bd4-7b4ffb1d3a4a"
  }
}