Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/LaWld6k/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua34990288/04XBZ7z",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-95c2d79f-06ce-4f3f-a35f-f1c1c463e726",
      "cw-7cbf87d4-d393-4019-abd6-616b3f66a26b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a319a128-9909-4995-a819-c2651078c780",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/LaWld6k/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7cbf87d4-d393-4019-abd6-616b3f66a26b",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}