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/w9QbAoa",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c564f741-aefd-4440-b6b2-ec75d447d5f1",
      "cw-e1dda56a-5fd5-47bc-8317-1dbf8c2ee0ca"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-15e630d1-d8dd-4d3b-971c-7c72621af051",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9QbA1r/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e1dda56a-5fd5-47bc-8317-1dbf8c2ee0ca",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}