Now I suggest to you to enable logging. This page describe how.
Than search in the log file for ‘HRTunerProxy’.
This works for me. BlackHole 3.0.3.0 (2017-06-14-master), VU+ Ultimo.
I tried for this too on VTi and VU+ Solo 4k and logging did not work. I don’t know if it is because of ARM or VTi. But HRTunerProxy works fine on Solo4k right after copy and restart.
Good luck.
