Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w9QEMqW/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua613885/wrAy6KJ",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-617c3d8e-40b1-46b1-a6c0-c1eee591e1f7",
      "cw-c7fe5012-d437-4a8c-9ce6-6fbea181fcb8"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-04abc211-7fac-4c69-b547-b5974ec672d9",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9QEMqW/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c7fe5012-d437-4a8c-9ce6-6fbea181fcb8",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}