Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9ZEM/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua549020/wlkAe1R",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-55c07b6f-18cd-47f7-9a18-99fe015d4cb9",
      "cw-9721945e-53aa-4ce9-91ae-9f021979b9b8"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c2507393-9b6d-40b9-a41c-e205bc68da49",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9ZEM/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9721945e-53aa-4ce9-91ae-9f021979b9b8",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}