Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/AB0RQ6Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-81899284-2dd3-48c4-9332-b1d1b8a76116",
      "cw-b2db65ea-a534-485a-aed8-5089e4da9b31"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-64d469cc-6789-4c89-bf81-802bd0c2eb88",
    "manifestId": "https://dam.iuav.it/iuav/containers/AB0RQ6Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b2db65ea-a534-485a-aed8-5089e4da9b31"
  }
}