Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/pvloGGZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5cd1fe78-0bc7-4100-92f2-d8dbfb0816b8",
      "cw-fc14a431-d2e0-46bf-ad45-41b97dc0c43e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6a67c435-2893-4c99-8ccc-4e59360092cd",
    "manifestId": "https://dam.iuav.it/iuav/containers/pvloGGZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-fc14a431-d2e0-46bf-ad45-41b97dc0c43e"
  }
}