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/LmW7W4b",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ecb5ead3-a69a-4186-916d-7bce7f5de3bb",
      "cw-d5a7fefc-1d26-4de3-961c-d43ac8b1b224"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-10d789af-35e6-4e41-a764-70883216d3b1",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5gWdWPy/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d5a7fefc-1d26-4de3-961c-d43ac8b1b224",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}