Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5KOJPOd/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua550957/58bkK6k",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3dfcf3b8-5624-4cb6-af6a-5c2d66a6c89e",
      "cw-0745d3f4-76b6-49c8-98fc-49039dae4178"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-9ec5bd51-4a96-4237-be99-c102db58d595",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5KOJPOd/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0745d3f4-76b6-49c8-98fc-49039dae4178",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}