Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/LaWld6k/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua34990288/04XBZ7z",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-df474bc0-1415-4650-9775-a5bd0bb5fb4b",
      "cw-b134012d-ae5e-4928-bb3e-6aa51da892f4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a7eb81d0-b025-4ad7-9444-86a618a211c9",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/LaWld6k/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b134012d-ae5e-4928-bb3e-6aa51da892f4",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}