Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/AOKkVVA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5ad847ba-9cd4-4127-a2b8-d3bce9dce45f",
      "cw-b0e66bf1-bc56-40f2-8d30-df0b5a84f5b2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-82814f50-901e-4c83-96f7-51cd3c937a7b",
    "manifestId": "https://dam.iuav.it/iuav/containers/AOKkVVA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b0e66bf1-bc56-40f2-8d30-df0b5a84f5b2"
  }
}