Purely by chance, (not in the manual) I have discovered that you must regenerate songs in order to get the VST to sound. However, I have further problems, BIAB is cutting off polyphony in Keyscape VST. Latency is a little more tolerable, about 6 msec, but could be better. Still unusable.
Keyscape is working fine in Cubase and in standalone mode - never had a problem


Win 11 64, Asus Rog Strix z390 mobo, 64 gig RAM, 8700k