Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Az5XNpv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1f5f8b14-2ede-4377-9436-12c0390c7310",
      "cw-1918be38-65f4-499d-b040-2f3e5ef0e9b3"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b889cafc-c336-4ca0-9d0b-a80a828f2cdb",
    "manifestId": "https://dam.iuav.it/iuav/containers/Az5XNpv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1918be38-65f4-499d-b040-2f3e5ef0e9b3"
  }
}