Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/v688JKe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-aef50c1d-871f-4d3f-bc1a-b22340f2942b",
      "cw-63d99fc0-8c19-4a84-94d0-cffb9ea37ddd"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a49d9c17-7894-47e6-b31b-ea55d0f2da48",
    "manifestId": "https://dam.iuav.it/iuav/containers/v688JKe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-63d99fc0-8c19-4a84-94d0-cffb9ea37ddd"
  }
}