Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5Ger1Gx/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua17965596/5gPymMN",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d981d76d-086d-4745-a0f4-291e124c88ae",
      "cw-47efc7da-15b8-4e96-894f-ad82cb1d19fa"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2badd3d8-f8c1-41fb-95b4-2252724027ea",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5Ger1Gx/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-47efc7da-15b8-4e96-894f-ad82cb1d19fa",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}