Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9mlb/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua548709/5vaXnKO",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-2d596eb2-4393-42cf-8d54-5c203d53bdab",
      "cw-1c3879a5-a630-490f-a9b3-cf99d5c19b04"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4e30d937-cade-4769-8465-a2cdc0811b53",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9mlb/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1c3879a5-a630-490f-a9b3-cf99d5c19b04",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}