Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wlmv4W2/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35027684/02812Yv",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a36e8e0c-2c0b-4bc3-9960-18a6c87b91d5",
      "cw-0b694f50-98ff-4de1-a4ec-8cfaf00f1950"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-9006c9b8-a7ed-4516-9886-a2c8169d7f44",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wlmv4W2/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0b694f50-98ff-4de1-a4ec-8cfaf00f1950",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}