Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wE9rBjr/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35039716/wX6qBJ1",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1aa9c41d-1d35-49bb-9dc2-f56d91b443d5",
      "cw-b94f02a3-6652-4f5d-b4a6-bea1678683d1"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-99644d78-bb9d-496c-ad88-bfb1351e3885",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wE9rBjr/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b94f02a3-6652-4f5d-b4a6-bea1678683d1",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}