www.makemkv.com

I'm getting this running MakeMKV under Fedora Linux

Current action: Processing BD+ code
Current progress - 0% , Total progress - 39%
Automatic SVQ downloading is disabled or failed.
Loaded 4 SVQ file(s)
Processing BD+ code, please be patient - this may take up to few minutes
Processing BD+ code using generic SVQ from builtin/00003.svq

Is there something I need to do to enable SVQ downloading?

On Linux, MakeMKV uses wget for downloading. You have to have it installed.