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_ua35043218/0nW8YAq",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-982c6424-fa5d-4da4-a037-e8e94c847bd5",
      "cw-a7df23c9-fa93-4412-9bda-26a68fe9a5fc"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-3d7ceb4d-40cf-44c8-a24a-e4e2f37c56c5",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9PWjop/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-a7df23c9-fa93-4412-9bda-26a68fe9a5fc",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}