Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/RABO2De/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3c54feb1-1955-48dc-8c7c-b62ab2e26b84",
      "cw-744fa790-99e1-4d39-ada5-5a5b30032706"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-3476bb08-eb1d-4234-bca9-4e4700df729a",
    "manifestId": "https://dam.iuav.it/iuav/containers/RABO2De/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-744fa790-99e1-4d39-ada5-5a5b30032706"
  }
}