Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/RAB3d6e/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-134eb57f-3b02-4327-83fe-95af62ba8574",
      "cw-87578009-4696-4235-9146-b0c9402a8347"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-bb722a99-b025-4190-a8ef-7beb6d0d9945",
    "manifestId": "https://dam.iuav.it/iuav/containers/RAB3d6e/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-87578009-4696-4235-9146-b0c9402a8347"
  }
}