Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wE9oBed/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35004567/LPxkB9Y",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1f624a78-51a4-441d-87f9-20574d69b54c",
      "cw-3dfcc658-b4d0-4000-ba46-54bee29b74e7"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0a753b8a-d9ee-4ac1-a162-1b103d4a0047",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wE9oBed/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-3dfcc658-b4d0-4000-ba46-54bee29b74e7",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}