Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Jv6Q57Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0522b179-6ebd-4b64-8cb2-f91ae174203e",
      "cw-7e26cbd0-6464-41b1-af4f-558aa7e3edbb"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4b10ed84-e213-4073-a357-3a3dcc13c495",
    "manifestId": "https://dam.iuav.it/iuav/containers/Jv6Q57Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7e26cbd0-6464-41b1-af4f-558aa7e3edbb"
  }
}