Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Am6Pl9e/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1cccaa04-fb14-40b7-ba6a-48248c4f6d98",
      "cw-1d0a81f8-7928-4352-b0f6-e98be9fbaa19"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-78833d1e-b907-4d5c-b4a9-3fd123e83310",
    "manifestId": "https://dam.iuav.it/iuav/containers/Am6Pl9e/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1d0a81f8-7928-4352-b0f6-e98be9fbaa19"
  }
}