Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wE9rxaq/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35040602/5VVM7ZE",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-9def295a-b2cf-4297-9ad0-aa9f0e1bcf3f",
      "cw-d9e52029-b8b0-4c4a-b157-a6c4ad3c1ee4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-db7a70fd-fe15-4cb4-9842-7959a446f184",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wE9rxaq/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d9e52029-b8b0-4c4a-b157-a6c4ad3c1ee4",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}