Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/A306lqe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-13200ce9-612d-49f6-8f37-a42e69a62958",
      "cw-1b81f81e-b6c6-4597-ae27-0a197e6ad841"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-78a3f9d7-68c2-4f23-b127-814601a58a42",
    "manifestId": "https://dam.iuav.it/iuav/containers/A306lqe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1b81f81e-b6c6-4597-ae27-0a197e6ad841"
  }
}