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-7ecf674b-003f-4655-87d9-72b3a1c64781",
      "cw-2228366a-14af-4eb0-b6dc-c7bc94f26887"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e7c27614-1e3a-446c-a509-32ea947a5441",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lzl8eXg/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2228366a-14af-4eb0-b6dc-c7bc94f26887",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}