Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Znkwx7v/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0fa8e91a-2fe1-4c90-bf71-2f7951cb8567",
      "cw-3ff98d0c-660c-4927-8fea-08a7cd7f3ae7"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-d77ea38f-391f-4e0a-aa31-73a348e76284",
    "manifestId": "https://dam.iuav.it/iuav/containers/Znkwx7v/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-3ff98d0c-660c-4927-8fea-08a7cd7f3ae7"
  }
}