Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w1YznJD/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35030561/LqG2QPq",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-35e6c0ed-8229-4f8c-bcc5-dd9685d56801",
      "cw-9d2bef5f-6d5e-467a-ae27-ac2e070decd2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-3dc05ec4-62d0-4409-8e0e-a220f9bf783b",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w1YznJD/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9d2bef5f-6d5e-467a-ae27-ac2e070decd2",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}