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_ua35019440/5YNaxZy",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-10d95d5a-a485-4187-8ce2-0463eee73273",
      "cw-ba1466a4-1f92-4d64-a065-09aaf50d9fd1"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-12bac3cc-c9c2-4b83-a1ad-72bec5afc866",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/0Akz7E7/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ba1466a4-1f92-4d64-a065-09aaf50d9fd1",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}