Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/nZbWnxv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ee0b86cc-7865-4f2d-bcbd-eb3945d63345",
      "cw-e82a5b14-3345-4189-addf-36a501eed07d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-bd7bffbd-0392-4d1b-8fe4-be5e7acbb28f",
    "manifestId": "https://dam.iuav.it/iuav/containers/nZbWnxv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e82a5b14-3345-4189-addf-36a501eed07d"
  }
}