Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Akrn25v/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5a2dfa42-5c3a-47f2-8b5f-a2f9b80e0d45",
      "cw-e948d634-0942-4316-bbb0-8b0758013021"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-383e82cb-1ff8-4a38-accb-c3ec72f20458",
    "manifestId": "https://dam.iuav.it/iuav/containers/Akrn25v/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e948d634-0942-4316-bbb0-8b0758013021"
  }
}