Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wQgyVZY/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35027999/5gWv4EZ",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-538b04fb-7e48-4bee-821e-907a97f198a3",
      "cw-ccca64d0-6af4-4afe-b2fb-6f8349370cb3"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-526567c9-e2cd-47e3-b9cb-1d88a5b8c56a",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wQgyVZY/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ccca64d0-6af4-4afe-b2fb-6f8349370cb3",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}