Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wE9rxaq/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35040602/w6xzQ7O",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ce4ea54c-1cd8-4142-b998-2fc720f42228",
      "cw-8dd1c5f7-f800-4b76-b6b5-436e7a1b3b8d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e8437894-ebeb-4616-b7e0-4d6d8b5a37dd",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wE9rxaq/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-8dd1c5f7-f800-4b76-b6b5-436e7a1b3b8d",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}