Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/03473k8/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35040528/LpWXOVl",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d9db3b74-83c0-4fad-8ad9-1ce707425eaf",
      "cw-e90e38fb-c512-4253-9ed2-6a6797a5f3d3"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-453b8dd1-5681-41f5-b149-457eb6b8586f",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/03473k8/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e90e38fb-c512-4253-9ed2-6a6797a5f3d3",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}