Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Rvoxx2A/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-05a73559-c8e6-4244-8bd5-3fe203e46cc8",
      "cw-6f6f1df3-b0ef-4bac-b296-f04c7529d693"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1b0c7f9c-7ee2-4709-ae09-cdee64d7a984",
    "manifestId": "https://dam.iuav.it/iuav/containers/Rvoxx2A/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6f6f1df3-b0ef-4bac-b296-f04c7529d693"
  }
}