Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/oA3yj4Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-67b5938b-6c71-4746-ab41-5a60b8a9a6f5",
      "cw-ec4ea805-2c2f-4846-8686-5531c370e8c6"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0efc2ff9-38f2-4f39-8e62-dc205cd8cf9b",
    "manifestId": "https://dam.iuav.it/iuav/containers/oA3yj4Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ec4ea805-2c2f-4846-8686-5531c370e8c6"
  }
}