Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wj7yeAr/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua548166/wj7yeN7",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-98a074ac-207c-4f59-a4fd-1613f8f584f4",
      "cw-cfa033b8-8dac-4106-afbe-47fff7d09e7e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e8f8dffc-a448-457f-b0a9-ef30052973a5",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wj7yeAr/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-cfa033b8-8dac-4106-afbe-47fff7d09e7e",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}