Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w1YznJD/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35030561/LqG2QPq",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-00643b92-72be-4bf2-921c-0e0a3fb51510",
      "cw-04381c21-d9f7-4131-b988-aa7e82d96022"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-12c4f583-a356-415d-94df-81f1437c3d6c",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w1YznJD/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-04381c21-d9f7-4131-b988-aa7e82d96022",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}