Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/9ZNm1Be/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-332d71c9-ce21-426f-bb8a-cdfc2fde28ed",
      "cw-52f17041-c9cb-40ec-ab27-12d9e07e1a54"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0f19aa31-b99c-4509-a938-ce5827026a8c",
    "manifestId": "https://dam.iuav.it/iuav/containers/9ZNm1Be/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-52f17041-c9cb-40ec-ab27-12d9e07e1a54"
  }
}