Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w9Nnxnk/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua549252/LqlEWbK",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-de70393f-2e1e-4cea-8a55-97856b01c150",
      "cw-1539e539-a9f6-48ff-9971-3ea6557e35e7"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-3c1223be-a6f5-492a-bba9-e6560feb23d4",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9Nnxnk/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1539e539-a9f6-48ff-9971-3ea6557e35e7",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}