Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/avXqo9A/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c8e41621-ee95-4a20-bbe5-e8b4295ccd80",
      "cw-643ff486-a63c-4202-8ee5-5bef0103829a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4a6df907-5ead-4a21-84cd-6f4d09d0ef4f",
    "manifestId": "https://dam.iuav.it/iuav/containers/avXqo9A/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-643ff486-a63c-4202-8ee5-5bef0103829a"
  }
}