Error rebar detailing in a plan view

Hello,

I’m using SOFiSTiK Reinforcement Detailing in Autodesk Revit 2021. When I try to generate rebar detailing in a plan view, I receive the following error message:

Autodesk Revit 2021
Error – cannot be ignored
An internal error occurred. The command cannot be continued.
Please contact the SOFiSTiK support.
Exception message: Value cannot be null.
Parameter name: right

This prevents the operation from continuing. I suspect it may be related to a missing or undefined parameter in the rebar elements, possibly the right-side value.