Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wj7yeAr/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua548166/5YJmEJy",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f1b18027-3af7-4820-9ff3-34b35efee7cc",
      "cw-5c4ba261-281f-4dda-b21d-b077e4daa0db"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-763b79e0-07be-412c-ac1d-0f1af0457788",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wj7yeAr/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-5c4ba261-281f-4dda-b21d-b077e4daa0db",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}