Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Znkx8Mv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-aeccf160-e3ed-4d94-858a-ef6237edb65d",
      "cw-aa3879f3-18b5-49de-b361-e3c7d51de297"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6373000d-b235-42e2-a237-ff516d594867",
    "manifestId": "https://dam.iuav.it/iuav/containers/Znkx8Mv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-aa3879f3-18b5-49de-b361-e3c7d51de297"
  }
}