Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/5AExYDv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-df7b25d3-8e8f-4d24-a1da-b03501c82726",
      "cw-0076e4c1-87f7-4f27-a0e2-8e9c5df8aa25"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-fb8fc4f7-8392-4246-8470-ebb970d3c594",
    "manifestId": "https://dam.iuav.it/iuav/containers/5AExYDv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0076e4c1-87f7-4f27-a0e2-8e9c5df8aa25"
  }
}