Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w9QbA1r/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua603003/5Gz7qpg",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d5e07d9c-3697-4435-bab1-27c42063c7e3",
      "cw-2e2e50af-b426-4d20-b736-7e23a789da67"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-d923e33c-ca59-45db-80ce-91baab7b4413",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9QbA1r/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2e2e50af-b426-4d20-b736-7e23a789da67",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}