Hey @wbleier
I suspect the touching of the outer domain face and the rotating wall face maybe causing the issue here. Could you try having a small gap between the car and the ground face to avoid this issue. Similar to what has been done in this tutorial: Tutorial: Incompressible Flow around a Formula Student Car
Let us know how that goes! In the meantime, I will report the error message to the team. (Thanks for reporting this)
Best,
Satvik