Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wkGxgJp/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua600939/LNJxPyj",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a401f046-4feb-4361-a1b1-bbd0d49418ff",
      "cw-b99a0d34-2f3d-48e4-87f5-2d0061fa8d8a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-f778e6e7-92f6-4e4e-8f7e-5a251a4a6268",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wkGxgJp/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b99a0d34-2f3d-48e4-87f5-2d0061fa8d8a",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}