Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wjWvYqv/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35027557/0Akzjam",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c1fe4e4b-07a5-4301-95e1-6174701a5a3c",
      "cw-385004ce-b9c1-44fd-b51c-33b6db0fc53c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-d486aa15-a674-4d31-9f63-cc1c24baba63",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wjWvYqv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-385004ce-b9c1-44fd-b51c-33b6db0fc53c",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}