Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5Ger1Gx/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua17965596/5gPymMN",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-855ccef9-0fc6-465e-bee3-a5a676bb7d49",
      "cw-cb4b937b-1ce0-4316-ae13-4fd9f1b7c595"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2a5aeb27-9e25-41a5-a778-9d570fd2440d",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5Ger1Gx/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-cb4b937b-1ce0-4316-ae13-4fd9f1b7c595",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}