Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w9QbA1r/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua603003/5KK4Vn7",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-bf5beda8-3509-4b93-a87c-07a33995d2e3",
      "cw-68f43d83-b643-416e-93de-08519514ece2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e40d89c4-a27f-4690-9396-97e5267bcf7b",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9QbA1r/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-68f43d83-b643-416e-93de-08519514ece2",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}