Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/nZbNqxZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6ac09963-828c-41a4-8f06-51df405ae5e0",
      "cw-3a671a0d-1f7d-4d32-b4ee-8404311106bf"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0f6ca823-1d10-4357-af8e-876d303a3f0a",
    "manifestId": "https://dam.iuav.it/iuav/containers/nZbNqxZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-3a671a0d-1f7d-4d32-b4ee-8404311106bf"
  }
}