Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZnkqDbv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-79cf0c96-9f68-4a06-a4c8-5f715c839110",
      "cw-4d1a2915-8e59-4a5f-b166-b877fb0afafa"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-5b00c921-8823-42eb-81ab-bbf8f2f0c037",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZnkqDbv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-4d1a2915-8e59-4a5f-b166-b877fb0afafa"
  }
}