Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wlmv4W2/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35027684/5xAVk9z",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1a7e8c61-3d3f-42dd-8d47-9dbdab48e72b",
      "cw-d12aca8a-66ce-4d83-89cf-5b81d6783252"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-9907ae25-8989-4b14-8ebd-5763082e2d0d",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wlmv4W2/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d12aca8a-66ce-4d83-89cf-5b81d6783252",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}