Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wlm1ED6/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua34998306/5VVpzdV",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d1ec9d50-5130-47fb-ac64-98672299773a",
      "cw-57f1e761-7c60-4f49-9426-e79a31ac3d6d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c9776347-eab8-4602-a82f-5ef7bcc19f84",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wlm1ED6/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-57f1e761-7c60-4f49-9426-e79a31ac3d6d",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}