Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5YNaxZg/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35019436/Ly9BNY4",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5562792c-85c3-4499-8ff7-ed4218aa8d7b",
      "cw-12b5afb7-2cef-4e1f-9a73-d8ec553c868a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1629b68b-ec35-4f6a-bc40-7654a4738b06",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5YNaxZg/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-12b5afb7-2cef-4e1f-9a73-d8ec553c868a",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}