Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/02mjY7j/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua548038/LP6mjyd",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-2c6e04e4-4f48-4aa7-bd5f-3799c1a394a0",
      "cw-680b5d75-488e-4155-8cf4-987b8cfaec66"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b677a0d0-8093-4bbf-ad5b-649ba965bc03",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/02mjY7j/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-680b5d75-488e-4155-8cf4-987b8cfaec66",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}