Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/2vRz6Vv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-93321c62-5e0d-46a5-9836-6d86d5102537",
      "cw-53c2e453-8a96-4556-b4d1-dbd822bdeced"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-44ee1a92-66af-4d2f-8d12-546c580d4a97",
    "manifestId": "https://dam.iuav.it/iuav/containers/2vRz6Vv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-53c2e453-8a96-4556-b4d1-dbd822bdeced"
  }
}