Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ArPjgrZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4f0c2568-950d-472f-9c73-c9a15a885581",
      "cw-ab28727c-c164-4aaa-8381-442b5dc7e41f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4fba9fd0-50f8-4841-a815-794f6b00be92",
    "manifestId": "https://dam.iuav.it/iuav/containers/ArPjgrZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ab28727c-c164-4aaa-8381-442b5dc7e41f"
  }
}