Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/w1YznJD/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35030561/LPxMbo1",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d724fcb7-c3d2-4093-acdf-0b425363d9ef",
      "cw-887904c6-a221-45cc-af68-9962d8ef461e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ca72825e-c101-4a0b-9f26-ecd92cb682fa",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/w1YznJD/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-887904c6-a221-45cc-af68-9962d8ef461e",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}