Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Akr7xLv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3baa4398-1e16-41e7-9d6e-452a74fa896c",
      "cw-449cf67f-665a-49f5-b0b5-fb44dec59b20"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-d426ac0c-eef9-4ed8-a019-bb20321d64a5",
    "manifestId": "https://dam.iuav.it/iuav/containers/Akr7xLv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-449cf67f-665a-49f5-b0b5-fb44dec59b20"
  }
}