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_ua549020/5vaXRql",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ffa84a39-f01c-412a-90d5-21b58c6091b8",
      "cw-f8bcc748-ab03-4131-8b3e-79cfc8bdd333"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0ce26401-efdf-424c-b4c0-53552fe4b88d",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9ZEM/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f8bcc748-ab03-4131-8b3e-79cfc8bdd333",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}