Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w9QEMqW/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua613885/5YeKv83",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d229c6b4-6cb7-42d0-a3a1-4120ff7b1f1b",
      "cw-a7a09566-3a18-454a-ba04-35f48d4fd150"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-115c6368-036f-4e5d-a80a-4daff65909fc",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9QEMqW/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-a7a09566-3a18-454a-ba04-35f48d4fd150",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}