Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/vDkPkBZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-83cee8c0-a646-429a-8c29-c487817337c2",
      "cw-a14324a8-d473-46e1-bff8-d3849201b1ba"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a21d7b16-434f-40d1-b697-fbefee02266f",
    "manifestId": "https://dam.iuav.it/iuav/containers/vDkPkBZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-a14324a8-d473-46e1-bff8-d3849201b1ba"
  }
}