Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/9AJ9Kbv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-697d5034-9fae-4691-bcd2-f64d9ce94f8a",
      "cw-04c27753-4fb5-46ac-ad39-eea755162b1f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-cec1d741-c8d4-4382-ae34-c054b78897c7",
    "manifestId": "https://dam.iuav.it/iuav/containers/9AJ9Kbv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-04c27753-4fb5-46ac-ad39-eea755162b1f"
  }
}