Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/vaXK3QZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4a66a7a1-ef2b-4ce9-bb1e-abdfeb3d54cd",
      "cw-8daaf256-a8ad-4321-9ddd-6d80cc885665"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-3a36d5e5-5d85-4d88-abf3-ccf4a6ce2f45",
    "manifestId": "https://dam.iuav.it/iuav/containers/vaXK3QZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-8daaf256-a8ad-4321-9ddd-6d80cc885665"
  }
}