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/wOaJGar",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d75c40ca-9b0e-47b3-9efd-abf96eea31e4",
      "cw-d2ea8417-402b-4d67-9b07-40b8648ecc56"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-be202100-a452-403a-a185-034c79d5c52b",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wj7yeAr/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d2ea8417-402b-4d67-9b07-40b8648ecc56",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}