Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5gN84bz/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua600710/LyGW7YK",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-be00fead-e7fe-4c1e-a628-1cdcd7a79055",
      "cw-5df8fa02-d46e-4118-b38b-90e408c85f2d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-70054135-4b65-4a7e-8189-768232c3d1e3",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5gN84bz/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-5df8fa02-d46e-4118-b38b-90e408c85f2d",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}