Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/oA3qgDZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-9ae8f29d-d7cc-46b8-b84c-45283d23f2e0",
      "cw-9fc41bc9-f84c-4db2-acb8-f557692d9c0a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4c8523d0-9725-415c-9d32-d6fd93b1b73d",
    "manifestId": "https://dam.iuav.it/iuav/containers/oA3qgDZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9fc41bc9-f84c-4db2-acb8-f557692d9c0a"
  }
}