Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/3ZpxkpZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3d065dac-1620-463a-a98e-6aff95477d5f",
      "cw-58b5e2e5-d7e2-4c3d-8f8c-187bc4ad6b4a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-17b47a2a-b908-48a7-b4f5-8e48669558ba",
    "manifestId": "https://dam.iuav.it/iuav/containers/3ZpxkpZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-58b5e2e5-d7e2-4c3d-8f8c-187bc4ad6b4a"
  }
}