Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/9ZN5N1e/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-50203da6-e2d4-4ce3-87eb-b8ce45d4a7bc",
      "cw-692cee65-4ca7-47d0-a80b-3337c060c027"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-3b8e79e8-5e5e-4d60-ac7b-5cb58dab4ff5",
    "manifestId": "https://dam.iuav.it/iuav/containers/9ZN5N1e/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-692cee65-4ca7-47d0-a80b-3337c060c027"
  }
}