Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZNn3q3Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-099e8837-f9d4-4374-8d00-14061e104a75",
      "cw-94f7200b-4092-4ce5-8026-476d59e700fa"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-60b7b88b-bfc1-4195-9526-30ece1de3993",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZNn3q3Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-94f7200b-4092-4ce5-8026-476d59e700fa"
  }
}