Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZjlGExA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-2ef2b350-2234-4d93-8402-bde5319e739b",
      "cw-6ed86f86-13e3-41d5-9ecf-34a91a6d635a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-36329cf5-5d0f-49cc-8ffd-98626c8e93cf",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZjlGExA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6ed86f86-13e3-41d5-9ecf-34a91a6d635a"
  }
}