Two items:

re: MIDI, go to Options > MIDI / Audio Driver setup, and make sure your MIDI device is selected. This might be a VSTi (as shown) or an external hardware device. See first picture.

Re: N/A. This means that the RealTracks are Not Available. If you have an Audiophile version, and the RealTracks are on an external drive, point to that drive from Options > Preferences > RealTracks (see second picture).

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BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones