Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wlmv4W2/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35027684/5gWvoey",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-cc14f365-c6af-4e5c-8267-7103b25a5ad5",
      "cw-5fbc5312-544b-47cb-9a61-1c0da5318c54"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-d94a8a72-40e5-4d5c-bff1-69fd070d369a",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wlmv4W2/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-5fbc5312-544b-47cb-9a61-1c0da5318c54",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}