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-18e4a61f-cdee-4dad-87c5-3454a35a1849",
      "cw-899a6f53-623d-47f4-9dca-a7c39353c0bc"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-7e5742da-0ee5-4cf6-8513-cb981e0466a6",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wlm1ED6/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-899a6f53-623d-47f4-9dca-a7c39353c0bc",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}