Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/QvPgkXZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-090acbe0-b749-41e1-a130-0d2ef8826feb",
      "cw-c8bac1fb-3a45-4ef6-8ab8-1d366786667b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e7a4deb7-b24e-4a36-b107-582cc18f85b8",
    "manifestId": "https://dam.iuav.it/iuav/containers/QvPgkXZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c8bac1fb-3a45-4ef6-8ab8-1d366786667b"
  }
}