Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZbQOx5e/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-49d84612-c7fc-49db-bfdd-d8df9d813b79",
      "cw-01ddfc79-520f-4783-b8da-73936508b091"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-175623e5-861a-4dde-9271-527fc49b1b3d",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZbQOx5e/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-01ddfc79-520f-4783-b8da-73936508b091"
  }
}