Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Zjl0z0A/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f986fab7-9e64-4c11-94fc-f7ca25908211",
      "cw-006fde7e-b0e3-4cb4-8836-59ee6c61ebbd"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1e2024f2-6671-447a-bd59-36764526ba12",
    "manifestId": "https://dam.iuav.it/iuav/containers/Zjl0z0A/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-006fde7e-b0e3-4cb4-8836-59ee6c61ebbd"
  }
}