Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/eg8nQ3Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c49b2b56-e2ad-4846-ad01-9ae446846c08",
      "cw-959086b4-324d-4733-9cd5-7a0e494b3a83"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-7f8b8e27-a682-431f-a7af-dfb4b3e1b74f",
    "manifestId": "https://dam.iuav.it/iuav/containers/eg8nQ3Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-959086b4-324d-4733-9cd5-7a0e494b3a83"
  }
}