Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Jva0QoZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-7d4c41e3-47c0-40c9-9297-34a2b641298d",
      "cw-e236bcf0-c152-4546-b5f7-e19b2c22b821"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-eca268ce-b97c-41dd-8598-ace93eac42b3",
    "manifestId": "https://dam.iuav.it/iuav/containers/Jva0QoZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e236bcf0-c152-4546-b5f7-e19b2c22b821"
  }
}