Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ArPjpGZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c90463e0-ce27-4936-b141-2ad1863e1a3b",
      "cw-fdd9de74-c97b-457c-8628-f556181793d8"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0c926e9d-68c3-4e9a-964b-7fe16df30cda",
    "manifestId": "https://dam.iuav.it/iuav/containers/ArPjpGZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-fdd9de74-c97b-457c-8628-f556181793d8"
  }
}