Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wlm1ED6/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua34998306/LqGAXDK",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f3ccb177-356d-4c59-9c1b-fc2287467d8d",
      "cw-21b378f6-1e53-4705-8822-bd6206789533"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-cf0c7269-e6d8-460f-b3ce-5242a3cd8235",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wlm1ED6/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-21b378f6-1e53-4705-8822-bd6206789533",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}