Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5Gna9vz/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-25e3cfec-a931-4744-8aca-bbe4d1324fbc",
      "cw-8fbcdddb-c76e-4e16-9a00-f647d1bc27e4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "5Gna9vz",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5Gna9vz/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-8fbcdddb-c76e-4e16-9a00-f647d1bc27e4",
    "imageToolsEnabled": true,
    "imageToolsOpen": true
  }
}