Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/LP63GMn/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua551027/wbd82Y4",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-01ed0a8e-e831-4796-bc25-d7e8984fc693",
      "cw-254f5546-a7e3-4d9f-971e-57eac077bbe4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a5348bec-2a66-403c-9dee-0885a57cdc93",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/LP63GMn/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-254f5546-a7e3-4d9f-971e-57eac077bbe4",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}