Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/rvG6X1Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-e1d63b01-b426-4063-a40d-f2959e168fc1",
      "cw-10b8e6a8-6f12-4325-b90c-b4663e435e74"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b9bb32c1-05f1-4dcf-bd26-52c28f4c6829",
    "manifestId": "https://dam.iuav.it/iuav/containers/rvG6X1Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-10b8e6a8-6f12-4325-b90c-b4663e435e74"
  }
}