Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/kv4b6we/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c5933294-2d99-402c-8faa-b416cfe56c3c",
      "cw-0a5f354e-2ee9-4059-848e-e55d4a54b7bb"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b28835e1-32cf-41f7-9119-f1d9bcd9b8c2",
    "manifestId": "https://dam.iuav.it/iuav/containers/kv4b6we/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0a5f354e-2ee9-4059-848e-e55d4a54b7bb"
  }
}