I can access the BIAB plug-in in Ableton Live 10, both VST and AU on my Macbook Pro running Catalina 10.15.3

I can drag from the VST plug-in and it asks me whether the track is harmony, solo or drums to convert to MIDI. I selected the appropriate one and it appears to be working but ultimately nothing shows up in the timeline in Session view in Ableton Live 10. It appears they are there in arrangement view but nothing is there.

Same thing if I use the AU plug-in, either dragging single or multiple tracks.