Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5KOJPOd/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua550957/5VRkXQV",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-eaedb334-7b04-4fff-a1a1-3bb61a9f2647",
      "cw-eb528a6e-6f91-497c-9b71-3fb26b1901df"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-29c20481-601c-43f1-ad3d-cdac7c88d56c",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5KOJPOd/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-eb528a6e-6f91-497c-9b71-3fb26b1901df",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}