Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Az5JrXv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-04221f2d-7d66-4a37-88ad-245ccea13219",
      "cw-4ae5ddcd-f6bf-4f93-b9c3-cab500258d2f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-81810448-cb48-468a-9ef4-8634e6f98c1b",
    "manifestId": "https://dam.iuav.it/iuav/containers/Az5JrXv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-4ae5ddcd-f6bf-4f93-b9c3-cab500258d2f"
  }
}