Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZjEjr0e/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a6dfd4fe-2732-4c95-b039-7c98cabc1166",
      "cw-16b18f9c-05c7-4b46-8671-69ceb4bca1a5"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c7cd1e31-041b-47d7-8548-53cde6ce51a5",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZjEjr0e/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-16b18f9c-05c7-4b46-8671-69ceb4bca1a5"
  }
}