I try to use the wheel2a and wheel2b in Bricklink Studio. These are the old spoked LEGO train wheels, available in the Development Version 20210710, the files are 24300 and 24400), but both models are marked as "nullbrick" when I open the appropriate 210710.lxf.
Is there anything I can do about it to use those wheels? I looked around a bit but couldn't find a solution for that problem.