Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w9PWjop/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35043218/LoJ489V",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-e24bac0b-b893-4f38-a7cb-3ebb17bed45e",
      "cw-054b241b-2ec0-441f-ac22-d68a81237b13"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2d59b9fa-5c1b-4a2b-bcb5-8a739d58eafd",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9PWjop/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-054b241b-2ec0-441f-ac22-d68a81237b13",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}