Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/nZbWnxv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-7c23592f-832c-416d-b66f-2cca4acce7c3",
      "cw-18d083f3-3703-405e-8a10-0ce6640b6f65"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a65bba47-2f0d-4f49-a394-99a118dddf02",
    "manifestId": "https://dam.iuav.it/iuav/containers/nZbWnxv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-18d083f3-3703-405e-8a10-0ce6640b6f65"
  }
}