Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZnkqoWv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0bc118fd-3802-4be8-a6e6-f0684106dc5d",
      "cw-9808c738-863d-439a-91d7-e038da111d72"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-7ec01a65-ea98-45a8-8dab-7c54ff09e071",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZnkqoWv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9808c738-863d-439a-91d7-e038da111d72"
  }
}