Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/AkrKokv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-95204f72-39c3-4173-a25c-98fcae3a62e7",
      "cw-08e9470d-9ce8-424e-8e0e-ba7a23204de6"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ab869f9c-c1e7-486e-8d04-e7511b530bf5",
    "manifestId": "https://dam.iuav.it/iuav/containers/AkrKokv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-08e9470d-9ce8-424e-8e0e-ba7a23204de6"
  }
}