Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5Kz4Bp6/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3bc371bf-b693-4b4e-99c5-73a0fdde76c8",
      "cw-736c2268-9425-406c-9cb8-f5e0e2cfdb2e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "5Kz4Bp6",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5Kz4Bp6/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-736c2268-9425-406c-9cb8-f5e0e2cfdb2e",
    "imageToolsEnabled": true,
    "imageToolsOpen": true
  }
}