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-7e5d891f-b38b-49fd-9bf7-09dac6d484ca",
      "cw-8dbf3b7b-a0bf-4ca3-8c72-3eeeac799a83"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-23a0816e-d9a7-46a0-95dd-b1a3aa0a4f21",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5VVxrQd/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-8dbf3b7b-a0bf-4ca3-8c72-3eeeac799a83",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}