Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/be9NgkZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-2c024875-9bfb-4648-b09e-702ee79b083b",
      "cw-9537c8c6-6d2e-4c7e-b4fe-d70a120c3881"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-baa8f80a-7c30-4ed0-a452-4f84831140c8",
    "manifestId": "https://dam.iuav.it/iuav/containers/be9NgkZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-9537c8c6-6d2e-4c7e-b4fe-d70a120c3881"
  }
}