Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w9O6jJ9/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4f0697a9-4f27-43b0-9a4c-f589d6c23c12",
      "cw-8fb28b75-d8cf-4370-a01f-5f439881f1d6"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "w9O6jJ9",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9O6jJ9/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-8fb28b75-d8cf-4370-a01f-5f439881f1d6",
    "imageToolsEnabled": true,
    "imageToolsOpen": true
  }
}