Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9ZEM/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua549020/La8m2NW",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d4b54993-5d4f-45ae-a2c9-fad24370ab59",
      "cw-85361c6b-5104-4e51-af9a-7aeaede04e0a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c67b8036-7da8-4765-b86e-e11ad027eb9f",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9ZEM/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-85361c6b-5104-4e51-af9a-7aeaede04e0a",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}