Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w9QbA1r/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua603003/wQK2d4z",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-7aa00642-bdf1-43e4-9479-bb65b7cb4021",
      "cw-bde5040b-feef-43f1-af3b-7749915a785e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-8b0c7079-1a81-48aa-ba17-fff5ce77ad0c",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w9QbA1r/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-bde5040b-feef-43f1-af3b-7749915a785e",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}