Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZnkEg9v/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5dd98c3b-8353-49bf-8bd6-8cbada207bf7",
      "cw-7955381f-5736-4380-82b7-8a29881fa0be"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-cb6163a7-0953-4508-9d0b-20d156ef6540",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZnkEg9v/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7955381f-5736-4380-82b7-8a29881fa0be"
  }
}