Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/LqG4BX9/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua34986773/LDAv9Yj",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3464dba2-57a9-4eb6-9208-0b53b0494ca5",
      "cw-f591d27f-cad4-4e69-a5bc-4bca09f4b0ed"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-405e7d32-24de-4534-9ee4-d58a2450b9fb",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/LqG4BX9/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f591d27f-cad4-4e69-a5bc-4bca09f4b0ed",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}