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-26741be0-382c-491e-ac3e-82adf95a00d0",
      "cw-a68deabd-7a0d-414a-b494-ce5a77c30aaa"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a1423304-32e4-41bb-ae0c-6e9c6212f213",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/0Akz7E7/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-a68deabd-7a0d-414a-b494-ce5a77c30aaa",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}