Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Jv6NGbv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-70f5bebc-f256-4558-81a2-4e6d989db8ed",
      "cw-5b36b447-99b6-470d-9f78-d6ac6337cdff"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-5b5790c2-b4c4-4ccb-adaa-5393b63bbf38",
    "manifestId": "https://dam.iuav.it/iuav/containers/Jv6NGbv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-5b36b447-99b6-470d-9f78-d6ac6337cdff"
  }
}