Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9DDa/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua547781/5YJm2nE",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d0c46fc5-28b2-466a-9d2f-6a49c429ab45",
      "cw-1c615c1e-9c27-4a3e-b1cd-3232fc53bb32"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-dec90fe1-0aa8-45a8-af1e-d121d424ad0d",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9DDa/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1c615c1e-9c27-4a3e-b1cd-3232fc53bb32",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}