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_ua35027684/02812Yv",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-8b63e100-c237-4ea4-be3c-a340b2f1f1dc",
      "cw-30a9b583-a029-4e66-8672-b2fb66674dc0"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-950b03bb-07a9-4948-9353-016afc70cd87",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wlmv4W2/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-30a9b583-a029-4e66-8672-b2fb66674dc0",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}