Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w9QbA1r/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua603003/5Gz7qpg",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5f08f255-a642-495b-b8b2-8ef366b0ea10",
      "cw-01e92b61-7167-4188-8442-16ccb7ccb5b2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b9f61f8f-b1f7-460d-9901-9d8483ff2469",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9QbA1r/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-01e92b61-7167-4188-8442-16ccb7ccb5b2",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}