Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5By9Kko/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5da1ef9c-56b1-4138-b782-8d82928baa1c",
      "cw-c3cb3c12-d206-4497-9d78-47f4ce9ca661"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "5By9Kko",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5By9Kko/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c3cb3c12-d206-4497-9d78-47f4ce9ca661",
    "imageToolsEnabled": true,
    "imageToolsOpen": true
  }
}