Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w6xKk31/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-744f78b2-3a9e-4601-afb9-8bc18d227058",
      "cw-7480e7a5-f476-42ec-a21c-426b2a33f532"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "w6xKk31",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w6xKk31/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7480e7a5-f476-42ec-a21c-426b2a33f532",
    "imageToolsEnabled": true,
    "imageToolsOpen": true
  }
}