Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/0Akz7E7/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35019440/5xAVg4z",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-e17e93ee-8b4d-4838-85be-b8b64e9cfbb0",
      "cw-4e2c81c8-062f-42f4-82b4-f67c9be60769"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-09fdd1f8-ac0c-4b18-8f02-d5acdb593efa",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/0Akz7E7/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-4e2c81c8-062f-42f4-82b4-f67c9be60769",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}