Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5VVOMXV/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35046131/5KY87P3",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3ee32217-5575-45fd-bd8d-bd81a34c0541",
      "cw-99884ee3-4b6b-477e-a933-780b577cbec3"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-de60a029-25e1-4167-b55d-1451f584bff9",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5VVOMXV/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-99884ee3-4b6b-477e-a933-780b577cbec3",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}