Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/9AV4g5Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-59e5103e-3e8e-4620-a9cf-4be171b67927",
      "cw-7fd110a8-e6ed-4ae6-ba8e-5eeb01cdfe98"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e800ce36-292b-40b7-bf07-0d3b4503ab80",
    "manifestId": "https://dam.iuav.it/iuav/containers/9AV4g5Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7fd110a8-e6ed-4ae6-ba8e-5eeb01cdfe98"
  }
}