Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/AExj3wv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-89d07b18-2c2b-46ae-a219-f5b301c0e16e",
      "cw-83fee68b-82d8-4e68-a3d8-a24db9a495b5"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-5dca6ec6-c00c-4435-b8d7-7e912f4a48a3",
    "manifestId": "https://dam.iuav.it/iuav/containers/AExj3wv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-83fee68b-82d8-4e68-a3d8-a24db9a495b5"
  }
}