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/wlkAe36",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-426e1737-f5d0-488e-8b65-9b22a1b42da0",
      "cw-91d95f2e-104f-459b-a305-43080410d756"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-dde1ba53-613f-47a1-a01b-3fbff77ba6cb",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9Nnxnk/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-91d95f2e-104f-459b-a305-43080410d756",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}