Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w6X8bYK/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6f17314a-716d-4ca3-82bf-8b90dffe1622",
      "cw-33035de1-b9c5-41c3-b1cf-fe9f04490214"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "w6X8bYK",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w6X8bYK/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-33035de1-b9c5-41c3-b1cf-fe9f04490214",
    "imageToolsEnabled": true,
    "imageToolsOpen": true
  }
}