Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5KOJPmK/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua550976/wQG3Job",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d36abf7c-5412-4747-9eb1-e992b40cfed2",
      "cw-c4e33ac7-75c4-4082-9dbd-63709a148fe0"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-44299e13-27b4-4041-aaf3-f8228ec50173",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5KOJPmK/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c4e33ac7-75c4-4082-9dbd-63709a148fe0",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}