Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5gN84bz/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua600710/0MKOqYe",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3b40cc42-079b-4a56-b33e-26db6058113e",
      "cw-0043db7f-b638-4914-b706-b5fa895988c5"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-87f6261b-7453-4a3f-a227-f69b2e604d65",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5gN84bz/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0043db7f-b638-4914-b706-b5fa895988c5",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}