Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/Lzl8eXg/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua34971074/LoJ6pvA",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-bdcfafd4-2094-4263-9f17-53448d1cb28b",
      "cw-eca0b238-35a1-409a-bfcf-301876a545b4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0c936e92-69b2-4992-93df-5717f5f7da4e",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lzl8eXg/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-eca0b238-35a1-409a-bfcf-301876a545b4",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}