Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/e50REgA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b348f253-0960-485a-ba21-27746f677e1d",
      "cw-7dd14ad3-02d2-462a-9fa4-f2b443538cb2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-8e80b892-5937-4f90-8807-2f9642025b36",
    "manifestId": "https://dam.iuav.it/iuav/containers/e50REgA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7dd14ad3-02d2-462a-9fa4-f2b443538cb2"
  }
}