This error occurs when MakeMKV cannot reach its key server to download the Hashed Keys (HK) required to decrypt specific (often 4K UHD) discs . Because the servers are frequently hosted in the Russian Federation
- Corporate firewall
- Antivirus (e.g., Avast, Kaspersky) flagging the download as suspicious
- ISP filtering
- Outdated root certificates on Windows 7/8
This bypasses the automatic download entirely.
8.3. Registry / Config File Override
- In
~/.MakeMKV/settings.conf, look for:
Change toapp_UpdateEnable = "0""1".