Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/9ZNRMXZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6e6e9f98-b031-44bd-9d60-e5f8be403e01",
      "cw-56dfa716-5ab4-43be-bb81-41afac5707d0"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0dba84fd-4149-4d08-bf9a-52b1fc6027be",
    "manifestId": "https://dam.iuav.it/iuav/containers/9ZNRMXZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-56dfa716-5ab4-43be-bb81-41afac5707d0"
  }
}