Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/LqG4BX9/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua34986773/034mVRV",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-7b0e4753-589c-4a98-9476-35d357e8ef2b",
      "cw-55251de9-71a6-4d26-ab9f-eae22e78e742"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c1cc02e6-4f2b-4fcc-890d-539b35aea57e",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/LqG4BX9/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-55251de9-71a6-4d26-ab9f-eae22e78e742",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}