Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/9ZNRMXZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-52235c4b-1d84-4952-a027-fa6271078e7f",
      "cw-c03149b9-3362-40a5-8141-132959aec5e2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-cf7017a3-8ffe-41f6-a4e3-3771483f7a81",
    "manifestId": "https://dam.iuav.it/iuav/containers/9ZNRMXZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c03149b9-3362-40a5-8141-132959aec5e2"
  }
}