I'm not sure if this is related, but worth a try:
1: In the mixer, select Plugins
2: Make sure you have a VSTi set up for the first slot. Click on it to launch the VST plugins page
3: Select an available VSTi for the first slot,

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BIAB & RB2026 Win.(Audiophile), Windows 10 Pro & Windows 11, Cakewalk Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Session Keys Grand S & Electric R, Kontakt, Focusrite 18i20, KetronSD2, NS40M, Pioneer Active Monitors.