Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5xJ7klV/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua600336/5xJ7kvE",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-8c27cff0-ed93-4d5a-b4a7-6719a385428d",
      "cw-8e30259b-28a5-48a8-b48e-230dbcb4817b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e1d3804a-e29f-40d6-a782-a981395d9836",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5xJ7klV/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-8e30259b-28a5-48a8-b48e-230dbcb4817b",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}