Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w1YznJD/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35030561/wrWxyvJ",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-602de52b-42d8-448f-97d8-cd27b6183515",
      "cw-3e3b2375-2605-48de-86f6-21a96d3911c4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-817bfaea-ff44-4f24-b3db-70a3b22c77f7",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w1YznJD/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-3e3b2375-2605-48de-86f6-21a96d3911c4",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}