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_ua549020/5vaXRql",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ba78b4ad-ab80-406e-8abb-44707c0650df",
      "cw-cdc4479e-0ce0-42e9-869f-7ac20fa99f6f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-dd3e11fc-518e-46e3-ae54-ea33fab8f034",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9ZEM/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-cdc4479e-0ce0-42e9-869f-7ac20fa99f6f",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}