Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/LD8qWBq/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua547754/0AW2ddW",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5679c783-8c1f-4825-9992-fa3e8e1465e0",
      "cw-26d2b0ba-dfba-4be2-9874-b58efb2be380"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1d15589a-67b1-42e7-be3d-eaed12de002b",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/LD8qWBq/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-26d2b0ba-dfba-4be2-9874-b58efb2be380",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}