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_ua35019440/0281OZv",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c0f3dbc4-b643-408b-aa2f-3db9804eb0b1",
      "cw-496ee202-0a0b-4ee2-a0c3-dc2ee6548c14"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-f78b4c4d-811a-4a8c-8ae8-ff8994c71ff4",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/0Akz7E7/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-496ee202-0a0b-4ee2-a0c3-dc2ee6548c14",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}