Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/Lzl8eXg/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua34971074/LpW7j1k",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-844ecc1c-ea17-40fe-8e41-4d2c705fb659",
      "cw-5dea5a17-59b2-4e32-a7d0-6fce3d688a31"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-92b323b8-f2c3-4ea4-b8c2-860adaaac5f2",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lzl8eXg/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-5dea5a17-59b2-4e32-a7d0-6fce3d688a31",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}