Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/vDWgGdZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-20dcbf28-1e25-4a75-a131-4e9b1cae1f87",
      "cw-cf684266-38a8-4242-afe1-38c5ef0c4845"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-232a00ce-222d-4922-af20-a1b476b1a27d",
    "manifestId": "https://dam.iuav.it/iuav/containers/vDWgGdZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-cf684266-38a8-4242-afe1-38c5ef0c4845"
  }
}