Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/LP63GMn/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua551027/wj7rlj7",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-28e1a904-7150-41a0-8caa-edff3b8964ce",
      "cw-169a77a4-4c64-4de6-a0b9-96f11039b820"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-43b3575f-92fa-40f4-9f73-c5af94773df6",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/LP63GMn/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-169a77a4-4c64-4de6-a0b9-96f11039b820",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}