Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZpwOGPe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a825a974-be90-4d2f-87f9-b9b089577271",
      "cw-1532decd-1b0c-46d6-8dbd-a27bb0ab8707"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c6fd206c-760a-4745-89aa-e6adacd6e807",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZpwOGPe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1532decd-1b0c-46d6-8dbd-a27bb0ab8707"
  }
}