Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZbQ4gQe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5e7f0a60-3727-4a96-a25d-c245e2be0cfb",
      "cw-2d089e43-0506-4b1a-86a0-1c4be9d304c7"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0bced72b-84e7-4a34-8617-54b62dd4a0da",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZbQ4gQe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-2d089e43-0506-4b1a-86a0-1c4be9d304c7"
  }
}