Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9mlb/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua548709/LeqmkRW",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-57c000dd-d0d5-4caf-8ff0-a803c684cfc7",
      "cw-6e326156-7b9b-4308-ad14-d3bef284e422"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e0543d3d-bc67-4031-840e-7af1ea85aa24",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9mlb/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6e326156-7b9b-4308-ad14-d3bef284e422",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}