thank you for your reply! Unfortunately i do not have a 9.01 build from 5Schatten anymore. Since today i am on the latest nightly-release...
It 's a little special in my case and configuration. I am using a HTPC with a DVB-S2 card and built-in BD-Drive. The mainboard is an Asrock J-4205 ITX board. Nevertheless with my old Escalade Remix 8.2 images the makemkv decryption is working (e.g. on the James Bond BD collection). Since Leia beta not anymore. How did you managed to get a working makemkv decryption?
Fortunately i found an old 5Schatten RC5 9.0 release which i still did keep on a laptop. With this version decyption is working with the old makemkv addon. So this is the last useful known libreelec release in my opinion for this topic.