Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZbQ4gQe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5d688468-b151-47a4-8efc-6b86d0c8d672",
      "cw-1ccc2ce3-1c33-4727-ab4d-74b744423101"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ba97e173-1dd3-48d5-8c7b-ec04a3497c7b",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZbQ4gQe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1ccc2ce3-1c33-4727-ab4d-74b744423101"
  }
}