Download z2m is not supported

Im trying to use the download backup for my Sonoff Zigbee 3 plus dongle under Options-tools.
After requesting backup, I pressed the download_z2m_backup, but I got Not Supported message from HA. Any ideas?Screenshot_20230617_093141_Home Assistant|270x499

Can’t see the screenshot.

If I try it from the companion app on my smartphone I’ll get a similar message, but if I try it using a browser on the same smartphone, I can download the backup.