Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5xJ7klV/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua600336/wrAlPJ8",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b05a80cc-dc12-4038-8e2d-ff00ec54fbe8",
      "cw-38994561-8f2b-4022-bdc4-feb735f2977a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-8289c962-c71b-416e-b7f0-e1b7c35d317e",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5xJ7klV/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-38994561-8f2b-4022-bdc4-feb735f2977a",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}