Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/04xQJqr/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua3497622/LyqrvG1",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-8ed4de27-53a3-4e6a-9bd5-a70aebef51c9",
      "cw-de35d5c6-3bae-49c2-a4fc-80cfbd59a7fb"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-fa7e887f-1138-4185-b41b-221ecc0b7084",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/04xQJqr/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-de35d5c6-3bae-49c2-a4fc-80cfbd59a7fb",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}