Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/v78njRA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0aa41c64-8521-4dcd-8b6a-eddf3ab383e8",
      "cw-87079bd2-4b2d-4cc7-a179-8475df96bd32"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ad0fcf6a-ce6a-435d-bf48-c86d13ed1789",
    "manifestId": "https://dam.iuav.it/iuav/containers/v78njRA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-87079bd2-4b2d-4cc7-a179-8475df96bd32"
  }
}