Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5xJ7klV/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua600336/04elgM2",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f866805d-08ea-477d-bc38-9c7c9f50e660",
      "cw-f5cca5f9-59bf-4bd8-8b1f-8bcd07061739"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-13ab5e8b-9135-446e-b128-e792b78d85a2",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5xJ7klV/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f5cca5f9-59bf-4bd8-8b1f-8bcd07061739",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}