VLC - Blu Ray: No valid processing key found in AACS dynamic library file

I got a new Blu-Ray Writer from LG and wanted to use it with VLC to watch Blu-Rays. I got the files for playing encrypted Blu-Rays and put them where they should be. Some Blu-Rays play and some throw an error: "Blu Ray: No valid processing key found in AACS dynamic library file"
What can I do? I do not want to buy a Blu Ray player (Software) if it works with VLC what it does (sometimes).
I am running VLC ver. 2.2.4 for macOS (64Bit).
I can however rip them using MakeMKV but this is not my goal so this isn't necessarily the long-term answer.