Hi - I too have this issue and the above solution doesn't cure it (tried last night).

I'm running:-
Cubase 10.5.20
BIAB2020 DAW Plugin 2.12.15
(Full Audiophile version of BIAB2020)

When you open the VST instrument editor window for BIAB2020 the entire Cubase DAW environment will randomly crash out to the desktop – sometimes within a few seconds, sometimes after a few minutes – no warnings, nothing. It is so unstable it’s very unlikely to allow me to select a style, generate it AND STAY OPEN long enough to copy the WAV files to the DAW.

NOTE THAT THIS ONLY HAPPENS if the BIAB window is open – with the plugin window closed, it never crashes even though it’s still loaded on a track.

The Cubase environment was 100% stable PRIOR to using this plugin.

AFTER crashing back to the desktop, it may take many attempts to restart Cubase (typically 3 or 4), and when it DOES load there is always no audio – quitting once more and reloading seems to eventually cure this.

The crash logs from Cubase report failures in several different modules.

No other VST plugins have this effect (and I have many).

The computer has HUGE amounts of resource – it is VERY high end.

I have raised a suipport ticket but heard nothing.

At present as this product was purchased purely for the DAW integration, it's completely useless to me. :-(

Paul.