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/wRa3JX4",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4b30ef29-7fb4-4bf3-8cb7-d7854ba138c1",
      "cw-2d88372e-1034-4858-9e39-e7cdc116eba4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-223606b0-89a6-4cc0-9f6d-ed6f7ebeb83e",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/LP63GMn/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2d88372e-1034-4858-9e39-e7cdc116eba4",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}