Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/e50Pa3A/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1ef56d57-fc8e-4a29-808c-02edf73cea60",
      "cw-2a5904df-370c-4549-bec3-1f17aef869df"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-34bf7a9e-5c52-4846-a9a3-06b891e500f1",
    "manifestId": "https://dam.iuav.it/iuav/containers/e50Pa3A/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2a5904df-370c-4549-bec3-1f17aef869df"
  }
}