Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/LqG4BX9/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua34986773/LDAv9Yj",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4f60a963-b0c1-486f-afc2-f8c88f5efcef",
      "cw-fea6e821-833a-4fd4-b003-42a91578a0a2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-5743ad57-d012-4453-8cd2-af8d7134b64e",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/LqG4BX9/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-fea6e821-833a-4fd4-b003-42a91578a0a2",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}