Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/RvoPRXA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-38485c87-6f92-489f-ad87-4bebbef5cdc9",
      "cw-af0db01b-8ed2-4f3a-93db-9554cf8d6190"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-f01fb136-ede6-4541-bb1d-0e5b1256a427",
    "manifestId": "https://dam.iuav.it/iuav/containers/RvoPRXA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-af0db01b-8ed2-4f3a-93db-9554cf8d6190"
  }
}