Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w9PWjop/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35043218/wE9r8QM",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-2862075d-074d-4f19-bdc9-82c18764a3c9",
      "cw-1081e565-d2e4-4eb2-94e7-887cbfa30b59"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-83618f81-d613-4831-9b66-1418e2dbb375",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9PWjop/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1081e565-d2e4-4eb2-94e7-887cbfa30b59",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}