Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/3ZpYgMv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-68d4328f-7688-4215-9d83-5978a3c631e1",
      "cw-6046d884-b2e1-4119-84ca-05f5cf2b4294"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e7c954b4-14c9-4f76-80cb-6c34e613d2e3",
    "manifestId": "https://dam.iuav.it/iuav/containers/3ZpYgMv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6046d884-b2e1-4119-84ca-05f5cf2b4294"
  }
}