Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5VVq6Jv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-166ba4a6-10b1-47a9-af60-f08717e2a626",
      "cw-66e55fdd-b1c3-48a6-8c5b-2f121fb1d3e4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "5VVq6Jv",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5VVq6Jv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-66e55fdd-b1c3-48a6-8c5b-2f121fb1d3e4",
    "imageToolsEnabled": true,
    "imageToolsOpen": true
  }
}