Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5gWdWPy/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua34987749/5GnJng2",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c2b3a760-3624-4dd5-8b08-29b7aafb8b77",
      "cw-2fa8f2f6-0a56-4b8f-abad-66d1ec0b84fa"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b10bcd1b-cc94-48bc-9637-d357bde2aec2",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5gWdWPy/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2fa8f2f6-0a56-4b8f-abad-66d1ec0b84fa",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}