Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5VVOMXV/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35046131/5KY87P3",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f02a2847-1643-44bc-a75a-1a980c78b62e",
      "cw-ead54cec-736c-4a59-85e8-e3987e0adee1"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-34dd5ef8-892b-4ca4-a99b-0a645814b19a",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5VVOMXV/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ead54cec-736c-4a59-85e8-e3987e0adee1",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}