Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/LP63GMn/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua551027/LP63G8m",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-73595030-be2e-48f9-8ce0-a22d1c3f9de8",
      "cw-7deb7159-ed3b-4d78-a994-fc2d2a0aaf2f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-09ceb32f-a7bd-4e8d-b9cc-599dfc953aa7",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/LP63GMn/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7deb7159-ed3b-4d78-a994-fc2d2a0aaf2f",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}