phiber That's what I thought...
Solarmass Doesn't work because of the protection.
Justin As I said, all others (even Asian sites) link to the original download site for the KEYDB.cfg file and this thing was last updated in march 2018.
You can give it the "Solved" tag, after more research there is no way to play newer Blu-ray's natively. The only solution, beside not being a solution in my opinion, is running a wine installation like Leawo Player. You can call MakeMKV a workaround but this thing seems shady and confusing for new Linux users like me.