Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wE9rxaq/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35040602/wO2WerG",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c6378387-8059-43bf-b9a1-d87a7a10da83",
      "cw-6f7cfe95-b4f8-4f39-8ae8-bf0a365aa84f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-457efe31-4ab0-4d75-8fb3-2d828fce2761",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wE9rxaq/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6f7cfe95-b4f8-4f39-8ae8-bf0a365aa84f",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}