Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/LD8qWBq/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua547754/La8mOOk",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0d07e1bf-a80e-4168-b22d-aca1e13add44",
      "cw-d3e222b6-6109-43a1-a6e9-5af583b7923c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-905454e4-8995-4581-8c1b-5a01f7326947",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/LD8qWBq/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d3e222b6-6109-43a1-a6e9-5af583b7923c",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}