Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9DDa/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua547781/0MvmpRM",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b7f85083-181d-41d2-9812-23a276afa4f3",
      "cw-4e849b2a-f1d3-4e89-9134-845b5e0ff133"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a6ceecdf-c562-4b1e-9ef2-d27a5f35957e",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9DDa/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-4e849b2a-f1d3-4e89-9134-845b5e0ff133",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}