Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/3Zp1mMv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5ef09c46-d12b-4f34-b9db-149c2cfb335e",
      "cw-9f69daee-4d65-4d5a-bf68-a49b46d01caf"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-036fecf8-d5e3-4851-b7e1-1383933c2df4",
    "manifestId": "https://dam.iuav.it/iuav/containers/3Zp1mMv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9f69daee-4d65-4d5a-bf68-a49b46d01caf"
  }
}