Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/A308dpe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6562fcc9-0fcb-4910-8b77-4d133d1f9c23",
      "cw-b90d15e7-7eda-45f8-989a-e29a33fe6ed9"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b43b0f33-acf3-44b0-a694-828c0ed34100",
    "manifestId": "https://dam.iuav.it/iuav/containers/A308dpe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b90d15e7-7eda-45f8-989a-e29a33fe6ed9"
  }
}