Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/JZq6KQv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4846cb28-7afb-4bc1-a52d-8cc1d54efe27",
      "cw-b68598ef-5bef-4989-8c5d-1f5ee92b8647"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0a7082fe-f03d-42c7-991f-38465e616bff",
    "manifestId": "https://dam.iuav.it/iuav/containers/JZq6KQv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b68598ef-5bef-4989-8c5d-1f5ee92b8647"
  }
}