Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/EZndzNA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-edbfc6f9-d17d-4ac9-a308-3456bd4e5d59",
      "cw-527acc71-6305-48b7-bca3-9d823f4bada9"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-7d04b53a-2c16-425f-9f90-4a7586b98cd9",
    "manifestId": "https://dam.iuav.it/iuav/containers/EZndzNA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-527acc71-6305-48b7-bca3-9d823f4bada9"
  }
}