Cubase 11 problems after installing Acustica Audio's Sienna

Hi

I bought Austica Audio’s latest plugin - Sienna and installed all versions - a, b and c

since I installed it I had several problems occurring in my Cubase 11

1 - big delay/latency when recording midi

2 - a much worse problem occurred today - the stereo bus in the Cubase 11 doesn’t have sound

when checking the system I saw that there was no option to choose stereo for the stereo bus, please see attached screenshot

Those problems are still happening even when not activating Sienna inside Cubase.

Any idea how can this be fixed?

thanks

There have been many posts regarding that company’s plugins here, Search results for 'Acustica ' - Steinberg Forums