Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/nZb7R7v/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-e947ee3f-8015-44c1-b7c0-e6c1ac839799",
      "cw-a64cd20f-3bb7-4d66-8306-68a6555cb7b5"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-bd0e8d9c-19cf-43ec-b90f-8255a1a47c3f",
    "manifestId": "https://dam.iuav.it/iuav/containers/nZb7R7v/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-a64cd20f-3bb7-4d66-8306-68a6555cb7b5"
  }
}