Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZnkO8Lv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-98b84930-9679-4d29-87d4-9bd14ce97792",
      "cw-03a8deee-38d6-4566-a178-e21e660a8e5f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e3189829-ec9e-4a62-a176-a6e49c6d8ae1",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZnkO8Lv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-03a8deee-38d6-4566-a178-e21e660a8e5f"
  }
}