Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/avX3n6Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-2cc808ee-b2e2-4a6f-9eca-d0b7b26e711e",
      "cw-238f9539-f0b8-4968-8fca-a5d0a6f51c4c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b397335a-19be-4c3a-9173-33e42d99974d",
    "manifestId": "https://dam.iuav.it/iuav/containers/avX3n6Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-238f9539-f0b8-4968-8fca-a5d0a6f51c4c"
  }
}