Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Awqjk2Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3dd62fc8-a25e-4cd9-9ff4-895cb7c6ba47",
      "cw-903eb721-ea55-4f14-ac88-365c89152a3a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b41b2ba1-6ec2-4024-9ed2-5bd0e777d32e",
    "manifestId": "https://dam.iuav.it/iuav/containers/Awqjk2Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-903eb721-ea55-4f14-ac88-365c89152a3a"
  }
}