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_ua550976/02mrZ13",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1a53e399-476b-4a7d-a0ca-a59eb53fb95e",
      "cw-ac285ca8-b3fa-4898-ace9-ca336f8db89c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-dc61364a-fd1e-4de5-914c-5c3e63edb01f",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5KOJPmK/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ac285ca8-b3fa-4898-ace9-ca336f8db89c",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}