Using a Mac, running OS 11.6 with Cubase Pro 10.5.30
I see midi input from my keyboard in the transport panel, but the little light in the VST Instrument indicating input remains dark, and of course no sound.
VST Instrument is functioning as I can play notes on the instrument’s graphic keyboard.
I have updated my players but that apparently was not the problem.
I have only had this problem since updating to Mac OS11, although it may or may not be the cause.