Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5VVxrQd/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua34990128/57gDp1P",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-9daee5aa-0015-4bc2-bcd4-e96d8afc6e87",
      "cw-932909e9-bd93-479a-830a-f823cb1bc49b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6bbe75d7-a2fe-4a69-b917-ea2c34dc28b4",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5VVxrQd/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-932909e9-bd93-479a-830a-f823cb1bc49b",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}