Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w9Nnxnk/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua549252/0MvmRp6",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-98e5ce4c-f77b-4dcf-89a7-503b86d68b97",
      "cw-f4cf575e-c725-43c2-b063-d88a00d16985"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-124ca1fe-ce4c-49c6-a816-50985cd6132e",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9Nnxnk/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f4cf575e-c725-43c2-b063-d88a00d16985",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}