Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/A3YNYqZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0ff93062-099b-4eb8-8f2a-c2a929152730",
      "cw-efb9d92c-a26a-484f-8486-80256439efff"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4f87245d-a8b1-4739-ac18-47796c7d0e6b",
    "manifestId": "https://dam.iuav.it/iuav/containers/A3YNYqZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-efb9d92c-a26a-484f-8486-80256439efff"
  }
}