Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/nZb6b1Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-485b85bb-973e-4c10-8c53-604e781ad8f1",
      "cw-16640e86-cda7-4ef8-88e3-8119476b9da3"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-39edc6fa-4a8b-4d07-9460-b75751137cea",
    "manifestId": "https://dam.iuav.it/iuav/containers/nZb6b1Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-16640e86-cda7-4ef8-88e3-8119476b9da3"
  }
}