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_ua34998306/5gWGADn",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-495d40ea-c87a-4dd9-b34d-e4de0fea0889",
      "cw-83723a83-cf61-4e73-9609-4eb08525ebc2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-9d8ba3d7-2610-4336-a3df-243b2ddd93fc",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wlm1ED6/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-83723a83-cf61-4e73-9609-4eb08525ebc2",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}