Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Bey21VZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-95dde692-43df-4a9b-baac-cd943dd59e8c",
      "cw-b2aebcad-8503-43e9-a8e2-f025f7316d0d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-09ddd349-1c63-456c-a67a-a147481e5936",
    "manifestId": "https://dam.iuav.it/iuav/containers/Bey21VZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b2aebcad-8503-43e9-a8e2-f025f7316d0d"
  }
}