Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZjlDx9A/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ed8d2cb0-356d-459a-bca9-db63fb5cb0b1",
      "cw-becb027b-865a-43a2-81ea-04ad2f888b7d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-d297ce34-617d-4ab3-ad9e-7660ac5bdb33",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZjlDx9A/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-becb027b-865a-43a2-81ea-04ad2f888b7d"
  }
}