Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/xZjylqe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-752fb0f4-56d0-47ad-91dc-8d8ef66c3be7",
      "cw-2b4864b6-18ba-4f4a-ac9c-a354e5a4a639"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-fa91bae4-696e-4ad3-b775-a06421960e74",
    "manifestId": "https://dam.iuav.it/iuav/containers/xZjylqe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2b4864b6-18ba-4f4a-ac9c-a354e5a4a639"
  }
}