Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Be5NLMZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a2fbb67a-408e-4801-87b6-3dcc601e92b9",
      "cw-8867513e-e331-4165-ab7b-38a1ed85ca82"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ec5ecb76-c505-4c86-aee7-cafb77108bf8",
    "manifestId": "https://dam.iuav.it/iuav/containers/Be5NLMZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-8867513e-e331-4165-ab7b-38a1ed85ca82"
  }
}