Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w9Nnxnk/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua549252/wXNmlX3",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-54e0eebd-a0bf-40eb-8f4e-f89d524e004b",
      "cw-595aea5a-1ad0-4f32-8b2c-8e1360773be6"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c1e6a4e7-0674-4f9e-9101-6e7b75b64d7e",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9Nnxnk/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-595aea5a-1ad0-4f32-8b2c-8e1360773be6",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}