Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/3ZpD37Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-00beea0c-ec61-4bc4-8785-9143d3699ae7",
      "cw-4b40c56f-e5d0-4f48-a425-343676b9c6bd"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-3ad4e487-28c4-41ca-a889-85912eb31c6b",
    "manifestId": "https://dam.iuav.it/iuav/containers/3ZpD37Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-4b40c56f-e5d0-4f48-a425-343676b9c6bd"
  }
}