Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/v78mEjA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-28af0232-ae3c-4620-9a47-210c9fd15334",
      "cw-b85efab9-4094-48d5-a99c-460ed572642f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1272e892-c16f-4a16-90c3-b316d5d1bef3",
    "manifestId": "https://dam.iuav.it/iuav/containers/v78mEjA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b85efab9-4094-48d5-a99c-460ed572642f"
  }
}