Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5KD6bA7/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-84fe7ada-cd1b-4c92-a421-cb07c2ff1064",
      "cw-c2f4cc62-0649-44a0-95d2-03c25ebb324b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "5KD6bA7",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5KD6bA7/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c2f4cc62-0649-44a0-95d2-03c25ebb324b",
    "imageToolsEnabled": true,
    "imageToolsOpen": true
  }
}