Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ArPLDpZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-35811d4d-cea7-49ac-93ab-2398a2778549",
      "cw-649a5597-e5cf-426f-9a6c-3bd2a25e4cbe"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a128624f-21d5-405e-9e8f-ea1474e4daf2",
    "manifestId": "https://dam.iuav.it/iuav/containers/ArPLDpZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-649a5597-e5cf-426f-9a6c-3bd2a25e4cbe"
  }
}