Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9DDa/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua547781/5gqmzAK",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1473751e-1205-4c8f-ac21-b154a3ff8152",
      "cw-2b70b492-380d-4ca8-b631-5451b792911d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-741575f5-6b8f-47e9-be3e-d2083e0704da",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9DDa/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2b70b492-380d-4ca8-b631-5451b792911d",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}