Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/9ZNgjBv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-253300f1-f534-453c-94eb-a435a1255494",
      "cw-6e4e589f-c2f6-4a3f-a1f6-5a6faab1b478"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-27aa44c0-c6a3-4d38-a6ed-0b616c153fdc",
    "manifestId": "https://dam.iuav.it/iuav/containers/9ZNgjBv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6e4e589f-c2f6-4a3f-a1f6-5a6faab1b478"
  }
}