I finally got this answer from BricsCAD support:
Dear Martin,
BricsCAD is not officially supported on virtual machines, but only native environment, exactly because of the way virtual machines handle graphic card resources.
We also do not prohibit the use of BricsCAD in a virtual environment, but please be aware that it is not recommended.
Thank you for understanding!
Kind regards,
I will try to contact RedSDK directly.